Movement and animation speed depend on a fixed point in time

[eXpl0it3r]

This leads to drastic speed ups if you "pause" the game thread, e.g. by breaking in the debugger. So for a short amount of time, the game will try to catch up again to the missed time. I haven't checked if the in-game time accelerates accordingly.

This I think could also be the reason why the movement sometimes feels really dragging.