When you go into lava, things go wrong.

So bacisally, i've found out that when you go into lava on Minecraft Snapshot 14w25a, a purple/black stripe will pop up across your screen. This is a bug, and in future updates i'm sure people won't want this to happen to them. Heres a video to show:
Link: https://www.youtube.com/watch?v=KptQPFzbEr4&feature=youtu.be