Steps to reproduce:

**1. Fly and glide with an elytra.

2. Whilst maintaining a high speed/by using a firework at the last second, crash into a wall.

Expected Results:

You'll now faze through blocks

Important notes:

You'll mostly faze through leaves, but i am guessing this glitch applies to all water-loggable blocks (though this is a guess, since I fazed through pistons and slabs and i did faze through a glass block so that contradicts what i just said.) 

This must also have something to do with my hitbox being in the incorrect position after you crash into a wall.

Crashing into the ground does nothing as far as i'm aware.