flying in creative into two blocks at once allows speed to build up when not moving

If I am pushing myself into a block (by holding W) and I break that block, normally I will start accelerating from there. 

However, If I'm pushing myself into a corner and break the block I will immediately be travelling at full speed.

To reproduce this effect, 

Hold w to fly forward into a block, make sure you are not touching any other blocks. After around 2 seconds, break the block. Continue to hold w as you do.

Then, hold W to fly into a block, but make sure you are flying slightly towards the corner of said block and another block. After around 2 seconds, break the block. Continue to hold W as you do.

You should be sent forward at max flying speed instantly, instead of accelerating up to that speed after the block is broken.