Have you ever been underwater diving? 
no but i have always wanted to go. Have you?
Yes! I've been scuba diving once.
Oh that is awesome. Where did you do it and how was it?
I went cave diving and it was amazing! Absolutely terrifying, but amazing.
hahahahah That is so freaking kewl! Where do you even go cave diving? Was is down in like Chile or something?
Close! It was in Cancun. Absolutely wild, man. 
oh wow! I didn't know you can go cave diving in cacun. What kind of things did you see? did you have to take a class beforehand to learn how to use the equipment?
Yup! We had to take a class given by the The Cave Diving Group, it was actually pretty interesting, but extensive.
was it really expensive? It's something I would LOVE to do but I imagine it would be expensive