You can push a boat by standing on it

Steps to Reproduce:

1. Place a boat or raft on water;
2. Stand on the boat;
3. Without sneaking, walk a little bit off center.

Observed Results:
The boat is pushed to the side and you fall into water.

Expected Results:
The boat stays in place.

Notes: With good timing, you can even walk on it as it gets pushed and avoid falling.