My grandma thought the Roomba was some kind of house pet and actually tried to feed it, on the floor. She just scattered a few pieces of cat food right in its path and said, “There you go, sweetie, have a little snack.” The Roomba rolled straight over the food, crushed it into the carpet, and kept going like it had a meeting to get to.

She looked genuinely proud, like she’d just done a good deed.