Ugh.. one of the reasons I always go over my PC's characters and ask them what the worst they can do is.. I don't like cheap tricks or easy win buttons.\
(Side Note, my other character I've been considering for this campaign, Optic, would've pwnd that guy.. Every eye power and good range blasts. hehe, I see you... BOOM! That's for cheating the system! and Hero point extra action = BOOM 2 for good measure.

)
Anyways.. Hmm, I kinda wanted it to be an attack, I've found that 'always the same dc' attacks are kinda boring for me. I do plan on using Power/accurate attacks, but not in a way that negates the penalties (Just for the 'normal' usage of them)..
3e has a Multiattack extra that could work for what I wanted to do.. I originally avoided it b/c it sounded like it was only built for ranged attacks, but I could substitute my movement speed if Insight's ok with that... it doesn't actually give a 'range' for the multiple targets thing, it says you 'spray' the multiattack across an arc, but doesn't give a size of the arc. I'm guessing running past multiple opponents and shoulder-checking each of them would work just the same, so long as I don't exceed my (Substantial) movement rate.
How's this look?
Inertial Slam: Damage 7 (Str Based), Penetrating 7, Multiattack 10, Accurate, Limited: Move with attack using Speed(-7), Side Effect: If any target successfully resists, Inertia takes damage(-7) - 11pp
Dropping Area to Multiattack actually saves me 4 points, even taking it up to 10 to account for Str (Since I had area rank 2 before, costing 14). Woot!
Also, question to Insight : The 'takes damage' side effect.. As is, I only have that side effect on the 7 damage from the attack itself, so would that mean he only takes an equivalent 7 Damage attack when someone 'blocks' him? (Could still add up if he tries multiattacking and three people block..)