Harbor Place in Baltimore,MD----
--has a massive fountain that has a nice walk through and enables pedestrians to cross over from the Hyatt to the shops there.On a hot summer day sometime around the late 80's,I'd get a huge bottle of MR.Bubble and go in a secluded part of the fountain and pour the entire bottle into the fast flowing waterfall. I'd hide the evidence and dash into the crowd to avoid the police seeing me there. Once the heat was off (usually half an hour) I'd go back out to see the massive bellows of suds. Because it was usually either rush hour traffic or folks going to a baseball game across the street,the crowd would gather to see and watch the billowing suds mount,then go up in the air crossing over Light Street and landing on driver's cars. Almost got caught one time but,the bottle I had was a Sprite bottle full of Joy and I got away with it.