Flying and holding CTRL really close to the ground, emits walking particles

The bug

Flying really close to the ground, but still over. (i.e 0,00001 blocks over the ground) you will emit walking particles whilst holding the sprint key.

How to reproduce

1. Stand still in the air (levitating)
2. /tp yourself 0.000001 over a block, i.e /tp ~ 75.00001 ~
3. Start sprint-flying

Code analysis

Code analysis by [Mod] bemoty can be found in this comment.