Boat glithes inside fast moving slimeblock

Boat glithes through fast moving slimeblocks, say moving on a 3.3m/s flying machine. Also creates unusual water particles.

How to reproduce
1. Create a supercharged flying machine, with a boat on the front (example in attachments
2. Activate the flying machine.
3. Boat glithes into the slimeblock.

Alternatively, click this link: http://youtu.be/P7MPNWEzp9Q?t=3m54s