Rigby tries asking them if they noticed anything strange, only for them to get 'barfed out' and leave. Mordecai and Rigby are surprised at Pops' difference and his not knowing of them, and find a couple of B-boys dancing. They then discover that they are in the '80s. Mordecai asks a nearby Pops to 'tell Rigby everything's fine,' to which he turns revealing his younger face. When they spit out of the phone, they think they are back at the park. They want their cell phones back!' to which Mordecai and Rigby are sucked into the phone and transported back to the '80s. They finally get a call from the MPC, who tells them that he had warned the two, and says, 'The 1980's called. Mordecai and Rigby still attempt to prank him but to no success. The MPC warns them to stop calling him, or they would pay. He passes himself off under the pseudonym of 'Stan,' but ends up adding 'Stanminson' when he's asked for a surname. He quickly hangs up, and Rigby goes next. Mordecai goes first to prank, joking that he had 50 pizzas that the MPC 'ordered,' but it turns out that he had ordered 50 pizzas along with hot wings that he needed to be brought over. Mordecai and Rigby each wrap tinfoil around their heads (to prevent brain tumors) and call the Master Prank Caller.

They find him ironing a shirt, but he is too busy taking a call with 'Joe Mama.' Pops allows them to use his old 80s phones but warns them of the possibilities of brain tumors. They attempt to prank The Master Prank CallerВ himself, but Benson furiously storms in and destroys the phone as a 'prank.' They instantly decide to use Pops' phone. The victims are Pops, Skips, and Benson, and always using the term 'Joe Mama' on each call (from the MPC on WooHoo). Mordecai and Rigby are watching a funny video about a famous prank caller, who is nicknamed 'The Master Prank Caller' on WooHoo when they decide to pick up the phone and become prank callers themselves. Mordecai and Rigby are sent back in time to 1982 after attempting to prank call their prank-calling idol, the Master Prank Caller.

Prank me series