Infamous 2 is quite a interesting game, you play as
Cole a normal guy who was delivering a package when it exploded, the explosion was a
Ray Sphere or at least I think that's how you spell it. This
Ray Sphere gave
Cole superpowers, more so it gave him the power to control electricity.
Being someone who controls electricity there is various things you can do with said electricity, for instance using it to horribly fry people to death, or using it to surf along power lines, or even gliding for short durations. However you will run out of electricity eventually then you will need to siphon some more from well anything that has electricity in it. TVs, AC units, Cars, even random pedestrians you can use to bio leech electricity from.