That's so much micro until I felt dizzy thinking about it.
I might be able to get the banshees on the collosus since they are so big.
Marines on Immortal should be no problem too, albeit some miss clicks but still manageable.
I think the hellions would probably be free firing by then or probably getting stuck behind my marines.
Yea my apm and micro kinda sucks... I always end up focus firing my own units by mistake a lot of times...
In this case I might end up shooting down my own banshees.

Yea. It seems to work most of the time. When they see my factory blocking the ramp instead of my barracks, (probably I should start changing this to hiding the Factory), the Zerg player almost always go roaches instead.
So I almost always lose my hellion harass team.
But since they went roaches, they suffer from my banshees instead.
After that I see mutas... I go oh crap...