Mark

Mark is a member of Cunning's Boy Scout Troop. During their most recent Night Hike, he saw an airplane flying among the night sky and yelled "Hey, what's that?". In response, a couple of Cunning's friends replied "It's a UFO!", angering Mark. Now, whenever someone bring up anything that has to do with "UFO", he goes absolutely crazy and will physically assault them.

The Lake Incident
At a Boy Scout sleepover trip at a local lake, Cunning was sitting by the lake gossiping with some friends, and after the single word "puberty" was mentioned, Mark ran in and explained his puberty situation to Cunning, saying "I'm in puberty right now! It hurts. Lots of pimples. I'm what you call a late bloomer.". He currently denies any of this happening, but those present know the truth.

The Pedophile Incident
At another Boy Scout camping trip that Cunning wasn't present for, Mark accidently walked in on one of Cunning's friends while the friend was in his underwear. The next morning, he openly called Mark a pervert in front of some other scouts, who also despised Mark for his aggression issues. Mark replied back, screaming "I'm not a pervert, I'm a pedophile!" without thinking about what he was saying.

Other stuff that happened
Mark has beaten up kids plenty of times, and when Cunning eventually became the Pessimystic and founded the ProcrastiNation, Mark and the UFO's attacked and were thwarted. To this day, he still rages an ongoing battle.