a few weeks ago sandman was on his last click and ran to go regen. then i based him with iron man and force blasted him into a wall, dealing a click and killing him

I played a game where I used Flash and GL to TK out Blue Flash and Treadmill Flash. Perplex up Blue Flash then to smack someone, then run back to Treadmill Flash, then have Treadmill flash carry blue flash back to safety. Lot's of reach and really irritated my opponent.

Used impossible man on his poison click to base opponent, and Metron to quake. Rolled my supersenses to avoid quake, outwitted my opponents L/C to poison on next turn. They could not break away because of IM's plasticity.

Poison with Armor Piercing on the AA Joker in stealth. Teamed with Doppelganger.

I was using my SI Doctor Strange against my brothers SI Iron man, my brother put his iron man out of range figuring he'd perplex his own range up then attack, I perplexed my doctors range up by 2 to a twelve and and attacked, pushing into my outwit and super senses, it was terrific

You wanna talk dick moves? BB Fire and Ice with AP building a barrier half around someone, AA Nightshade placing smoke cloud under opponent, Icicle copcicles around other half of opponent sealing them in completely.

Brightest Day Aquaman with Armor Piercing and a passel of Atlantis cannon fodder.

from the poll? Force Blast off the building (it's considered a pretty useless power, but it's fun to use)
in general? I like PCing my opponents B/C/F rolls

There are so many nasty things to do with MC.
My personal favorite is to take control of my opponent's MCer when he has one, especially if it's less than 100 pts and has multiple (UXM Xavier was a target of choice). You can now use the poor sob to control his own team, and then watch him take all the feedback damage for you.
Sweet.
And I can't wait to face Bane with a trio of Cuckoos, just to make him pump himself to death.

Perplexing up range.

Once, in a tournament, my opponent had a sniper piece on a building taking pot shots at my team. I placed my 0 range brick next to the building, perplexed his range up to 1 and attacked from the ground dealing 4 damage. He never saw it coming.

Several niche things.

Outwit super strength to get people to drop objects underneath them instead of charge/hypersonic. If the character is grounded, it will also half the movement from the charge, and they won't be able to get there. If you just outwit the charge, they can always throw the object.

Shield TA for range rather than damage. This is so obvious, and no one really thinks about it. Very simple and catches people entirely off-guard. A little flip on the take is to have 2-3 stealthed shield pieces, with SI Yellowjacket (either version). You can jump up to giant size, shoot for 8-9 range, and shink again behind the stealth wall. Works on the junkyard and the Days of Future Past maps pretty well.

Barrier to break prob control. This is so crucial. Take DC75 Ice (as example, cheap barrier at 8 range). Throw down a barrier on the other side of your target so that the target's PC cannot see him. Especially effective if the guy is packing tons of PC. Sure, he'll get to take shots at you back, but since the barrier lasts teh entire turn he won't have his support without dealing with the barrier or individual blocks.

Mulitple of just about anything is good: multiple prob, multiple perplex, multiple outwit, multiple barrier, multiple posion, etc.

Use Cosmic Spider-Man on a map with a ton of hindering.... with Dickbats from DC75th. Copy Bat Ally TA from Batman, and you have a Stealthed 14 speed HSS on a map of hindering, where no amount of Stealth can save the opponent

THere's a better trick to do with CSM. Play him in a map with a big blocking terrain feature and hide him in it. For example, the Jail, Sidewinder rookie and Psylocke Rookie from Armor Wars. Boost his damage, destroy two square of blocking terrain INSIDE an area of blocking terrain, then move into it carrying the SHIELD/Perplex combo of Psylocke with him, copying Serpent Society ATA to do it. Then , destroy everything in range.

I think "playing Cosmic Spider-Man" by itself counts as a nasty tactic.

I used Force Blast in Hawkworld against Nightcrawler...I threw him down the building, he colided with a wall and down to the high gravity...deadman wins...FATALITY!