Scuba Alien Sticker

I like to think of myself as an alien when I'm scuba diving. 

Think about it. 

We arrive on a ship. We descend from the sky. We enter a foreign environment that we can not naturally survive in. We require special equipment to survive the elements of that environment. Our technology is more advanced than its inhabitants. When we are ready to leave we ascend back into the sky and return to our ships. 

The inhabitants have no idea when we will arrive or when we will return. 

Scuba divers are aliens of the ocean.