You and your collogue friends went to a pool that has a raft floating at the middle, so you swam to it. You than noticed a 15 foot circle-like blob just floating in the water, as you thought it was a oil slick. Rachel tried to pet it, but it grabs a hold of her and consumes her like the blob eating it's own prey.
Rachel: AGH!! HELP! HEEEEEeeeeelp!!
Rachel was now melted to just bones and clothing as Deke, Laverne, and Randy panicked that it'll attack them next. Deke try to swim back to the shore for help, but the blob consumed him, as it seeped through the small spaces of the raft.
Deke: AGH! HELP-!!
Randy: Were dead, WERE FUCKING DEAD MAN!! This goddamn blob will eat us all if we can't get out of here!
Laverne: Calm down Randy, we'll be fine soon! I hope...