During a break from testing in their fifth year, the group of Gryffindor friends known as the Marauders – James, Remus, Peter and Sirius – are sitting outside on the Hogwarts grounds near the lake with their classmates. James releases and catches a stolen Snitch, Remus studies, and Sirius taunts Peter for being “thick” on an exam question about a werewolf. When Sirius complains about boredom, James spies one of their favorite targets, Severus, sitting alone and decides to start a confrontation with him.

Shouting out their favorite nickname for Snape – “Snivellus” – James disarms him with “Expelliarmus,” and uses the Impediment Jinx to make him fall down. As other students gather around watching their victim struggle on the ground, Snape begins to shout curses and hexes at James, who then casts “Scourgify” to fill Snape’s mouth with pink soap bubbles, gagging him. At that point, Snape’s childhood friend from Cokeworth, Lily, comes forward and tells them to “Leave him alone!”*

As Lily tells James off, Snape manages to get his wand back and hits James in the face with a cutting spell, possibly Sectumsempra. Angered, James retaliates with a silent “Levicorpus,” turning Snape upside down and allowing everyone to see his underpants. Lily again intervenes and makes James release him, but the harassed Severus made a dire mistake and yells “I don’t need help from filthy little Mudbloods like her!” That was to be one of the greatest regrets of his life, and a major reason his friendship with Lily soured.

Trying to make Snape apologize, James turns him upside-down again, and as Lily walks away, James threatens to de-pants him in front of the crowd, but since Snape was too selfish to apologize he didn't apologize. Which leads James to undo his pants and later on his underwear infront of everyone. Snape felt humiliated.

What will you do? Are you just gonna stand there and watch or are you willing to help him?