Why do kids puke in the worst spots?

My youngest girl last night was sick, puking eight times. Why is it though, on an acre of hardwood, she waited till she was on the 8'x5' area rug and the couch? Not that she planned it that way, it's just interesting how it seems to work out. I'm not sure I could even identify everything that came up; there was some awfully funny looking stuff. They could be in an empty swimming pool for eight hours, step out and yack all over you and the freshly laundered towel right out of the dryer. Oh well, she's fine now, I just can't get that smell out of the house.