Alright, so on most cars there is a lock on first gear, so you cannot (accidentally or intentionally) downshift into first gear at a speed to high for the engine at that given ratio. The lock, as I'll call it, continues on my car down till almost 4mph, I almost need to come to a dead stop untill it lets me easily shift into 1st. I don't think this is an actual locking mechanism however, it's simply the synchros on the gear box don't synchronize the transmission untill your car slows to that speed.

But the other day I was told that if I blipped the throttle rather high (sort of like in heel toe) it would let me into first gear at higher speed - and it worked! I use this method often now, but I truley don't understand it. If the clutch is in this whole time, how can revving the engine effect the synchros? I thought the clutch disconnected the engine from the tranny, so they could operate independantly. Thanks guru's.