SCUBA Duh-ving

I know that there's supposedly no such thing as a dumb question. I also know that everyone, everywhere has had to answer stupid questions in the workplace. Working at a dive shop is no exception:

• How many breaths can you get out of a snorkel?
• If I go under the water, can I still breath through the snorkel?
• Can you wear glasses with a scuba mask? (bearing in mind the skirt of the mask needs a water tight seal to keep the water out)
  
• When I clear the water from my mask, where does the water go?
• How do you breath through your nose with a mask on? (again keeping in mind a scuba/snorkel mask covers the nose)

And my personal favorite:

• Does it get dark on night dives?

Another favorite, though not a question per se, is a customer telling a coworker that she was taking a few small jars on her trip to bring home some ocean water. When asked why she was taking more than one, she replied (I swear I'm not making this up), "I want one for each of the water colors - The real pretty deep blue, the light blue, the greenish water - all of them!".

Honest....to....God...

I'm sure there are more, I just have to ask the other guys here, the above questions are just the ones I've heard personally.

The hardest part is answering with as little sarcasm as can be mustered...