Like an astronaut underwater

Okay, so has anyone ever heard this expression before and been like "what the heck does that mean?" Well, me too. But anyways my friend Ella decided to draw this and because she doesn't have a deviantart account and isn't allowed to get one, I let her post it here. I guess we're sharing an account now. You'll probably see more drawings on here that she made tho. I guess this should actually be her account now but oh well.

Drawing by - Ella (I had permission to post this)