So you're telling us, that when you press one of your mouse buttons.... Your FRONT mouse feet (which I'm assuming is where your buttons are) is lifting itself up?
Relax guys.
His clicking speed is probably a resonance frequency of his mouse, thus he gets violent amplitudes. This might be extremely dangerous; one day not only the front of the mouse might jump, but the entire mouse might slam up and down and completely wreck your arm while doing so.
I suggest casting lead into your mouse, because the change in weight will shift the resonance frequencies, so this can not happen.
thats what i do i think. when i'm trying to aim pixel precise back and forth i tense my hand and kind of lift my mouse up after each click and when i click it goes back down causing a little bump
So basically, you already know what the problem is. Try NOT tensing (lifting) and I bet you'll find that the front of the mouse stays firmly on the mat (or based on the quality of your question, the bare desk covered in food, random papers, cups of half-drunk red bull, and 17 empty lighters). Also, does your keyboard ever get jammed behind your desk?