Yup, it was the red hammer ones that I got stuck in myself. Most of them had a ledge at the side or front that you could get out of, but one just had a slight lip for the water to run down to the next level, but no walkable area that I could see.
And yeah - that auto-teleporting thing happened to me a few times: I'd assumed it was just my machine being weird. I guess it could be a deliberate "unstick" feature, but that seems kinda pointless when they've got the cool personal tower-teleporter. I never found it useful, but I did find it annoyingly auto-teleporting me away from places I was trying to reach. Admittedly, when I did get make it to where I was trying to get to, I'd usually just hit an invisible wall anyway, but the exploring was worth it anyway
