InFamous

You will unlock this Trophy on your way to completing "Stunt Master". After you knockout your first 10 stunts this Trophy will pop. I've listed all 21 stunts below that can be used as a checklist. The YouTube Video (credit to TheKingOfRuckus) details how to pull off each of these stunts. Please note that despite the video being part 2 it contains all 21 stunts.

Crush - Kill an enemy by crushing them with an object
Sticky Bomb - Kill an enemy by fixing a sticky shock grenade to them
Highfall - Kill an enemy by making them fall from a high place, usually over a ledge
Enviro Take Down - Kill an enemy with environmental explosion
Melee Finisher - Kill an enemy with the last hit of 5 hit melee combo
Air Strike - Kill an enemy with the Lightning Bolt move while Cole is in the air
Blast & Bolt - Kill an airborne enemy with the standard Lightning Bolt weapon
Flying Head Shot - Aim carefully, and take out an airborne enemy with a headshot
Flying Melee - Kill an airborne enemy with a melee attack
Unquenchable Thirst - Induction grind and transfer to 4 different grinds without touching anything else
Premature Detonation - Kill an enemy by making a bomb-equipped kamikaze enemy explode near them
Right Back At Ya - Use the Shockwave move to deflect a thrown grenade back at the enemy who threw it
Air Sticky Bomb - Kill an airborne enemy by sticking a grenade to them
Insult To Injury - Stick a grenade to an enemy, but then kill them with another weapon before it explodes
Whack A Mole - Kill a Conduit with the Thunder Drop move
Suspended Sentence - Kill an airborne enemy with the Thunderstorm move
Up Close And Personal - Kill 5 Enemies back to back with just the melee. Don’t fire in-between
Crowd Control - Kill 5 Enemies at once
Splash And Crash - While in the air, Shock an enemy and then hit the same enemy with the Thunder Drop move
Have A Nice Fall - Kill 3 enemies at once by making them fall from a high place
Ride The Lightning - Kill an enemy with Precision while rail grinding