What happens when you get a few mentos then drink diet coke?
my best guess if you would throw up.
If you get enough of both, you may cause an explosion massive enough to make you the first ever human space shuttle to travel to moon.
It will get really fizzy and will explode out of your mouth.
It fizzes and then explodes out of your mouth or nose or both.
Keep up that trick. It's a good one to cause the lining of your stomach to rupture.
I will put this the easy way. You will go BOOM.