Nazareth, used to have one person pay admission, turn around and come back out and get their hand stamped with the invisible ink and immediately press the backs of our hands together, then head back through the gate and put our hands under the black light and both would have a stamp. Repeat as necessary. Once at Flemington a friend and I snuck into the pits in the back of Butch Rampullas van under a moving blanket, July or August it was a little warm.