I own a Roomba and it's great. But like a guard in Milgram's famous experiment I just can't help picking on the little guy.
Here are three tortures I devised for Roomba. See how well Roomba handled them. (In all these videos you can see flashes of blue light coming from Roomba and the docking station; these are in fact the infrared sensors on Roomba which are picked up by the camera and which are not normally visible).
1. Escape from the legs of three chairs when placed in the middle of them.
2. Don't fall off the table top, you might get hurt!
3. You want to go home? Oops, there's an obstacle.
In the end I couldn't leave Roomba rotating on the spot and had to help out. Maybe I'm not so cruel after all.