|Season 4, Episode 7|
|Premiere date:||November 19, 2012|
"One Pull Up"
Guy's Night is the seventh episode of season four (and the eighty-sixth episode overall) of Regular Show. It aired on November 19, 2012.
Pops tries to prove to Mordecai, Rigby, Muscle Man and Hi-Five Ghost that he is one of the guys by drinking a whole gallon of milk in under an hour, but falls unconscious while attempting the task. 
The episode starts with Mordecai mowing the lawn, Muscle Man digging a hole, Rigby scrubbing the toilets, and High Five Ghost cleaning a window. But when the time turns to 6:00 P.M, they all scream guy's night! They all grab tons of junk food and are shown doing a variety of things, eating a lot of food, ordering pizza, playing video games, and watching a movie etc.
In the middle of the movie, Pops and Thomas come in, and Muscle Man orders Thomas to get more chips from the store. Pops then asks what they doing, and they reply: "Guy's night." Pops wonders why he wasn't invited to guy's night. The guys' say they thought Pops wouldn't want to be a part of guy's night, but Pops wants to join. They agree that if Pops drinks a gallon of milk in an hour and also lift the empty gallon jug over your head, he could become one of the guys. Mordecai and Rigby don't want Pops to do it, saying he can be a guy anyway, but Muscle Man convinces them.
Pops fails at his first attempt, but he wants to win so badly that he tries many times, but still fails. Then when Pops lays down he look at pictures of him and the gang and pictures about contests they won. Ex: The Eggcellent challenge, a Wing challenge, and a Cream Corn challenge. So Pops gets up, goes downstairs, and tries the challenge one last time. This time he drinks the entire galloon, but his face turns white and he faints. Then Pops is in a white elevator with a creature that looks like a drop of milk, with a mask. When the elevator opens Pops walks in a white room with other people who have won the milk challenge.
They then realize (thanks to Pops) these milk drop creatures are keeping the winners here, so they won't win the challenge. Then the milk drops start attacking them, and revealing their teeth under their masks. They all try to escape, but a few are turned into big milk drops, then when they reach the elevator Pops presses the button to go back. Before they leave Pops becomes friends with the other winners, and a winner promises that when he raises his jug he's going to honor Pops. Then when Pops is back he raises the jug and takes a picture of Pops' win and puts it in his scrapbook.
The gallery for Guy's Night can be found here.