The Old Drain Hose Under the Tow Vehicle Trick

OK i cannot keep my trap closed anymore.

Every time I see this thread hit the front page it reminds me of all those puddles (or long streaks depending on the slope) in Walley's parking lot when i pull out in the morning. Seem to be coming from a holding tank smaller than the RV or 18 wheeler though. :h

I thought vehicle radiators now have an expansion tank to stop the overflow. :B