lynaAlso, don't forget the skilled movement. You can bunnyhop and do all kinds of crazy shit, even more than in cs:s
You definitely can't bhop in CoD4. The most you can do with movement that's out of the ordinary is hitting a bounce. It's similar to bhopping only in the sense that it exploits a bug in the engine. To bounce, you need either 125, 250 or 333 FPS. With 125 FPS, you can only hit the short distance bounces. 250 for short (depending on which ones, some of them you end up going too far at the area you need to jump from) and medium. 333 FPS for the ridiculous bounces. 333 FPS is/was actually banned from being used in CoD4's competitive scene because the major advantage you get in jump distance. That includes jumping in general and bounces.
It's kind of crazy that they would ban using a certain amount of FPS but it makes sense I guess.