I cant do a thing. The whole world goes extremely slow. Mining is impossible and I was recording a video on youtube when this happened. I went back to 1.7.9 to see if it was my comp and it was normal as always.
This is something within the snapshot itself.
Using recording software introduces a 3rd-party influence on the game, thus it is not a valid bug. This is a technical support issue; and this site is for bug reports only. For technical support please use the Mojang Support Center.