I've never put mine in neutral and revved it up high

 

Obviously the flywheel is acting as a propeller and pushing you forward.... O.o

 

Naw, the fan is pulling it!

 

Its the foward clutches. If you pop the car into N and immediatly rev it and get a slight push its because the foward clutched are releasing slowly. If you keep the car in N for a few seconds and then rev it and it moves its because...... When the foward clutches slip and get very hot they sometimes "weld" themselves to each other acting as if they are applied when they shouldnt be.

 

My buddys car does this, then it finally goes "all the way in N" first time it happend we was going down the road, he threw it in nutrel to give it a rev, and it pulled so he asumed he must of been in d2 and not d3, so he throws it up into reverse lol.

 

If you think about it, it makes sense reving in neutral is going to sping the fluid in the t/c transfering whatever power to the trans w/ the clutches semi-disconnected.