THE ROCK GIANT OF SPEW
Yes, I know it's boring, but it's my first submission and stuff. Aaaaanyways... in this scenario you can witness the ultimate power. A sick rock giant. And then you can make one!
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To make a sick rock giant, first make an invisible tile where the giants mouth should be. To make an invisible tile simply add 256 things to the same space. Plants work, but the hidden FLAGX works even better. Then everything you put on that tile will be invisible. (See Berserker Jerker's template for a map-copy one) Second, place bombard cannons in it, as many as you wish. Maybe even a few onangers as well. However, if you want to get a cooler effect, then use trial + error to place a second invisible tile for trebs, like I said a moment ago, it'll take trial + error to find where you should place it exactly.
Then, fill in the giants body using rocks and stone piles. Make sure you leave room for a mouth (In which to puke), a nose (Pine tree), and eyes (So he can tell where he's puking). And there you have it! A puking rock giant, it doesn't even require triggers to work! As for finishing touches, you could put deep water in the holes where his eyes + mouth is, and add a circle of skeletons for pupils, and a rug for a tongue.