I was playing around this is what i got:
glitches include:
repeatable:
- getting into select buildings
- getting into any building using a horse
- getting into select buildings while riding a horse.
- getting into split rocks.(possible that it can be done while on a horse)
- getting a horse stuck in an awning
- getting a horse stuck in a tree ( it will also kill you if you mount and then dismount)
- some places you get stuck/ will kill you.
- floating horse ( kinda)
cant repeat but are known:
- falling through buildings( the one that i cant seem to repeat)
- multiple points in the video where the horse starts spinning and i cant control it. ( 5:32 & 6:11 in the video,)
and
here is the Video evidence.