I have done this a couple of times with a 5 gallon bucket in the kithen. Once when I was filling my 55 gallon I though i had placed the hose so when I turned the water on it would not shoot out of the tank, I guessed wrong and the water hose ran for a good minute before the started yelling about a lake in the kitchen!
Omg I do it just about everytime. It was worse when I use to have the 100 gallon tub. Its one of those things someone should video tape. It never gets old. We all know better. Yet it still happens.
Just almost did it on my 240 the other day.