When someone pees in a mountain dew bottle and closes the lid tight then puts it back into the vending machine or in the bottom of the machine so it will be later picked up by some thirsty shopper extremely retarded person (most likely a polish person)
"Hot damn I found a free mountain dew someone left in the bottom of the machine!" "Oh my God THATS NOT SODA.... ITS PEE!!"
Friend: "Hah! you got a Mountain Dew Suprise!"