I want to construct a rule that results in attacks that have a knockback effect. I dont want a character to specifically take points in move object though. Any attack with damage enough should do it, as long as the descriptor would work. For example, Flame Boy's Heat Ray just cooks you from the inside with a microwave descriptor, this could never result in a knockback, but any character with super strength should have some chance of inflicting it. Ranged hits from telekenetic or Force blasts would work too. I was thinking of making it a result either of a critical hit on the attackers part, or maybe a roll of a 1 on a defenders resistance.
Really I would like to see what other people do in their games. M&M doesnt seem to have a real solid mechanic for it, and I miss people getting tossed through entire buildings.