Mad Mark
When someone says they're gonna do something crazy and amazing, but it ends up being something you've seen before and it's not that cool.
'I'm gonna eat the entire pizza!' ... then he took one bite and said it was too greasy.
'I'm gonna start a fire in the school!' ... then he burned his hair and got in trouble for it.
'I'm gonna be a superhero!' ... then he just ran into the hallway and said 'I'm saving the world.'