I think Big Momma's power is guilt...crippling guilt. That or some sort of persuasion, like Eden. She seems to get her way a lot.

Do you think there is a chance that Momma shagged Adam? I have this feeling that maybe the brothers Petrelli are only half brothers...Nathan being Adam's son. Here's my line of thought....it really bother's me that Matt has the same power as his dad, but noone else seems to have that. If Adam were Nathan's dad, it would explain why Clair has the same powers as Adam...skipped a generation. I think that Peter followed in his father's "footsteps"...that was kind of hinted at when Big Momma told Peter that their dad had delusions of grandeur like he was having. Micah kind of has the same power as DL...manipulating objects...DL could just move through them where as Micah can make machines do what he wants. I don't know. Maybe there is nothing in that.