Doc Brown from Back To The Future has bad aim. It has taken me over 30 years to figure it out, but I woke up this morning with my own vision. Maybe because I have kids now and this is an ongoing battle in my house. My question to Doctor Emmitt Brown is, if not you, then who peed on the toilet porcelain to make it wet?

That was the day I invented time-travel. I remember it vividly. I was standing on the edge of my toilet hanging a clock, the porcelain was wet, I slipped, hit my head on the sink, and when I came to I had a revelation! A vision!
– Doc Brown