OH FOR THE LOVE OF-
Uploaded the wrong video.
The one I MEANT to upload, I edited out all the beginning bit where I forgot to turn on collision detection for the terrain... (I do that about 1:40 into this vid, I think).
See, this is why I'm not a professional YouTuber :P
Okay, I think I managed to edit it to not show my embarassing mistake. Not 100% sure, though - between my drinking , YouTube's online checks and my browser security settings, there's a YUGE margin for error