Spell help needed-- bouncy earthquake

So I've got a Mountain Giant hero that currently uses earthquake as an ultimate; what I would like to do, however, is make it centered upon him, use triggers to make him 'jump' up and down, and generally cause hilarious havoc as his bouncing ensues devastation. What's the best way to go about doing this, and how could I, say, let him keep 'moving' and have it follow him?

well i dono if you can have him move while doing it since it wud be a channeling spell.

but you could use starfall but change the effects.

lol, i dunno how to make the quake follow him, but i would suggest you get Lord Vexorian's Caster system, or use jass to do it. Using the UI to do this would be pretty dam hard. If this is for a multiplayer map with lots of other heroes, then i suggest you find a easier more simpler spell, because doing it with triggers would take alota space.