Glitches
I've been replaying Assassin's Creed to try to find some flags/Templars that I missed and I've been finding A LOT of glitches.
For example, I was in The Kingdom fighting some random guards when I counterattacked one of them and he started levitating and spinning uncontrollably. When I say uncontrollably, I literally mean it. The guard was in suspension for a good 10 seconds and he was spinning at what seemed like a rate of 20 rotations per second. While levitating, he went all the way across the area that I was at, hit a wall, and finally acted like a dead man.
I also stumbled upon another strange happening today while exploring Acre. A guard that was running after me jumped off of a building and somehow started hanging from a stone wall that was about 1 foot tall. I could see his arms holding on to the "ledge" and the rest of his body was going right through the ground. He got up and somehow ended up in a building that was next to the stone wall. He would occasionally poke his sword out to try to hit me.
Now the last glitch that I want to talk about his pretty strange. Again in Acre, a guard was kneeling on a ledge of a building, I tried swinging my sword at him and I basically teleported about 30 feet in the air from where I originally was. I fell and lost about 5 or 6 bars of synchronization.
I need to start making some videos. Has anyone experienced these or other glitches?
Yeah, alot of these glitches. I'm sorry AC maps is down or I could give you the link of all the funny glitches ppl have experienced over the last year with AC1. Needless to say, your not alone 
There's a glitch that I encounter almost EVERY time in one of the corners of Jerusalem.
The corner has a Scaffolding next to it.
It's one of those corners with a "round" corner piece at the actual corner, where at the top or something there's this swallow's-nest looking thing.
1)What I do is, I get on top of the scaffold.
2)I move to the very right, where I'm closest to the corner-wall-thing WITHOUT falling off the scaffold.
3)I'm on top of the scaffold, with a wall in front of me (crappy ASCII Commence)
-------|
----A |
=====
=====
=====
=====
A= Altair
| = Wall
=== is Scaffold I'm standing on.
4) I RUN UP, then quickly jump to the RIGHT at the height of my wallrun, Altair goes THROUGH the corner piece, goes out-of-bounds, so I am under/outside of the map, I see disjointed graphics, I can see through walls, and for some unknown reason, there is a Templar (for the kill sidequest) INSIDE the glitch.
I stopped being able to recreate it before, but maybe I wasn't trying hard enough. I went there and did those set of steps over and over again and was able to do it maybe 6 times before it stopped.
Templar in the wall?
Interesting....
Sometimes when I have assassinated an archer (particularlly near William's castle) and as he is falling of the building he has a gigantic loss of contol and his limbs are flying about, and he is spinning and flipping on the ground like he doing some sort of crusader break-dance...looks very weird indeed.
That always bothered me when a guard became spaghetti after hitting the ground, but I just kept telling myself "It's the Animus hardware. It's a programming issue with the machine in the game."
Then I saw ACB's engine and realized once a guard is just stabbed, their upper bodies become stone-hard. I prefer the spaghetti engine over the stone engine. 
I'm sure there was a video/article before AC:B was released in which the devs said that dead body animations and movement had been improved to make them more realistic when falling, and also to prevent so many guards sliding off roofs which can prevent looting.
I think they wanted to get rid of the ragdoll movement which happens when bodies fall and often continues after they've hit the floor, but a rock-hard body just looks stupid. I'm surprised it doesn't shatter on impact
I'm alright with the falling part of it, but not when I want to do a cool silent kill while sneaking up on a guard. In the past games, if you stabbed them from behind while holding their mouth so they don't scream, everything fit realistically. Now, your arm slides into their head while you shank them. It bothers me the most when you get them on their knees and stab their neck, only for them to slowly fall backwards into Ezio's legs. I wish they could blend the stone engine for the falling animations with the original engine when you're up close.
That always bothered me when a guard became spaghetti after hitting the ground, but I just kept telling myself "It's the Animus hardware. It's a programming issue with the machine in the game."
I tend to tell myself that it's a metaphor of the transcendental inconcievability of death, and a representation of the emotional distress caused by seeing a dying body, distorted beyond any compability with life... heh Espesially when it glitches badly. Sometimes it looks like it's whirling around an axis in the fourth dimension.
I'm sure there was a video/article before AC:B was released in which the devs said that dead body animations and movement had been improved to make them more realistic when falling, and also to prevent so many guards sliding off roofs which can prevent looting.I think they wanted to get rid of the ragdoll movement which happens when bodies fall and often continues after they've hit the floor, but a rock-hard body just looks stupid. I'm surprised it doesn't shatter on impact
I agree, I have not got AC:B yet but imagining a body falling to the floor with no kinda "bounce" seems a bit weird to me