Lets think logically really quick, because lord knows a lot of people don't do this anymore.(including me most times)
We have the engine spinning at about 1000rpm when you're at idle. We also have a transmission connected to our axles, which are connected to the wheels. Our wheels are at rest or 0rpm.
Now when we release the clutch properly and give the right amount of throttle then we accelerate just fine. Now take our cars, under powered and about 2500lbs. If you let out the clutch with out the proper amount of throttle then the now transmission that is engaged with the engine causes the crank shaft to slow down to the same amount as the rotation of the transmission. This causes our oil pressure to drop and could lead to the vehicle to stall.
You follow?
Now a quick and easy solution that I too had to adjust with my driving habit. YOU MUST GIVE THE CAR MORE THROTTLE when taking off from a dead stop or low speed. This will save you from stalling your car, hearing that annoying knock, and add to the longevity of your motor.
-d.p