Back in all the friends from that eponymous television show trekked to the beach, only to witness a jellyfish sting Monica. In this episode, Joey remembered seeing a documentary that advised urinating on the sting to ease the pain. Monica agreed to try the treatment and it worked. Unfortunately, in the real world treating a jellyfish sting by urinating on it may actually cause someone in Monica's situation even more pain, rather than relief. Urine can actually aggravate the jellyfish's stingers into releasing more venom.