While playing some Return to Na Pali maps (Abyss.unr) I noticed whenever you crouch while on floor with less friction (Ice), your speed is somewhat multiplied the longer you crouch walk, eventually greatly surpassing the normal running speed of the player. I believe this translates to basic Unreal maps also. However I haven't tried yet. I realize this isn't a 227 bug, but its a bug none the less.