Hey, up there, what ya doing?
We are going to have some fun. I've got the diet Coke, let's see, now how does this go together?
Okay, put the Mentos in the tube and the string goes here......
We'll put it down here , now let's get out of the way...
Eeveryone out of the way, Okay Zeke, pull the string!
It did shoot up about 15 feet, just didn't get it on camera. Fun FHE experiment.