I used to believe in Mario, I think. One time I used a sink, and then later in the day I used it again, not noticing that I turned it on much lower. The water fell in a different place in relation to the drain than it did earlier, and I thought to myself as I went to bed, "Only a good plumber could have done something like that... a plumber like Mario!"
I think Mario may have been my imaginary friend for a while, also. I was a weird kid.