I think he may have dressed up as/pretend to be a mentally disabled person. Not very awesome.
Valentinos are all over Nebraska
No way. He's dressed up as some kind of scientist or serial killer or weird farmer or something. There's blood stains on his shirt and he's wearing some kind of weird hat. If you're dressing up as a Fake Sugar Dick (WARNING, NOT THE REAL SUGAR DICK!) person, that's not what you do.
And he's not acting Fake Sugar Dick (WARNING, NOT THE REAL SUGAR DICK!). If he was, he would automatically do the stiff hand beating chest move that is almost universally regarded as the one you use if you're pretending to be Fake Sugar Dick (WARNING, NOT THE REAL SUGAR DICK!). He's just acting super weird/awkward in front of the camera which is a million times better than holding up your index finger and shouting "go huskers." The kid's got moxie.
I think he's imitating a frightened old lady.