What are some good comebacks for runners?

I frequently go for runs, and nearly everday someone feels the need to yell pointless comments. Generic things like run faster, go, and the like. Run forrest run is also common, but now my friends and i just say okay jenny and the kids stop. These things don't really get to me, i'd just like some good things to make these kids be quiet so they stop saying such dumb things while i run. Thanks for the help!