He/she could probably be MUTANT.
Let me provide you with the list of symptoms:
The MEGATRONIC HIPS:
When his/her stone-ish hips keep bumping your chairs so strong when walking and you get paralyzed from the waist down or you get thrown over the window because of the impact, that person is not human.
The INTENSITY 10,000 VOICEPOWER:
This is if you can hear his/her voice so clearly from the other room or even when you're in different elevators. Some people may view this as "oh, he/she is probably just too lazy to walk and talk to me," but no.... that's not it. He/she might break the solid floor if she takes even a single step. And that's when the INTENSITY 10,000 VOICEPOWER comes in handy.
The SUPERDYNAMICENERGY NINJA POWER:
When his/her energy is too irritating to bear but the person does not seem to be under any illicit energy boosting medication, that is another sign.
UPDATE: Also included in this category:
- "The bitch that writes all that nasty shit on the bathroom walls about people!" - reminded to me by cupcake. ;D
When he/she coughs and it sounds like somewhere around the world, there will be an EXPLOSION. Especially when he/she starts with the super loud "AHEM!" and you feel like you wanna cry inside like, "Oh no, people are gonna die..." and then the POWERCOUGH will come and you will be like "NOOOOOOOOOOOOOOOOOOOOOOOO......" on the inside.