Is it bad 2 swallow diet coke and then mentos?!
Answers: i have done it before and it fizzed right out of my mouth onto the carpet....
You might burp a lot, but it shouldn't cause too many problems.
it's safe, i've done it beforeyou're mouth will just get all fizzed up.
Other than a bad taste, no.
You will burp a lot and it might make your stomach hurt a little bit but other than that it's okay.