In the latest snapshot, if you are swimming and hop onto land while in the swimming pose, you will be swimming on LAND! When swimming on land, you will be lying on the ground. Using the WASD keys while in this glitch will make you slide across the ground. I also noticed that sometimes, jumping would actually produce a lower jump than when this glitch is not active. I also couldn't sprint in this glitch, despite me having enough hunger to be able to sprint on land. The only way to fix it is to jump back into the water with the sprint button held, and when in the water, let go of your sprint button. I couldn't find any other way to fix this glitch. I also provided a video so you can understand what I'm talking about better. Hopefully, this glitch will be fixed before the final release.