I just need to know how to make an actor "jump" without having to use the jetpack. I've searched nearly as long as I can stand. I have this actor that has no jetpack, it just jumps where it needs to be but I can't figure out how to do make it do that. This is probably one of the noobest questions that have been on the forum, but I need the help.

There have been noobier and stupider. Look at the scripts in Zombies'09, theres a jumping block in the trenchmen's and a lot of the zombie's scripts that should do what you want.

Or uh, Missions.rte. Mother crab, etc.

Thanks so much guys. I now have a jumping actor. My next question would be "is it possible to tell lua to only allow a character to jump again once they've touched ground?"

Yes. Look at Darlos' Darkstorm Electrolaser. It has effects that only affect actors when they are touching the ground.

Cast a StrengthRay downwards. You can also use an ObstacleRay, and then you could jump off people's heads and dropships.

Or you can just use GetAltitude, which is just as precise and needs less overhead.

As paul said, using getaltitude is the cheapest way, though tweaking the number can be tricky (i sure as hell havent got it right in zombies'09) and using an obstacleray would let you jump off hittable MOs, which is a plus. depends what you're looking for.

So you're saying that you could, with good timing and luck, jump into the sky through a cloud of dropship debris?
Awesome.

you'd have to make them hittable, they arent at the moment, they just hit stuff, but yeah, feasibly. you could leapfrog off of a rouge dropship engine if you were lucky enough, or a flying, blood soaked helmet at the moment.