Just posting this so people can organize their favorite combat experiences here.
My favorite? Ontop of the giant church in Acre, there is a Templar on a hollowed out un finished section of the church. I climbed up to face him and he grabbed me and threw me over the side of the church, leading to my highest "falling to my death". Needless to say it was very exciting to watch, so then I reloaded and returned the favor.