This Man's Navy Puns

First off a six-parter

1. If there are 500 rocks on a plane and you throw one out, how many are left? A: 499
2. How do you get an elephant into a fridge? This is a three part process A: open the door, put in the elephant, close the door.
3. How do you get a giraffe into a fridge? This is a four part process A: open the door, take out the elephant, put in the giraffe, close the door.
4. All the animals go to heaven for a meeting, but one can't come, why not? A: the giraffe, it's in the fridge.
5. A weak old lady has to cross a river full of alligators, how does she get across? A: the alligators are at the meeting in heaven.
6. As soon as the old lady gets across the river she dies, how? A: the rock fell on her head.

No 2 A real cool guy walks into a cafe. He wearing sunglasses, tidy haircut, but just a super cool guy all round. He orders a glass of condensed milk and puts it on his table. Next time the waitress walks past he asks for a glass of black coffee. Now he has a glass of milk and a glass of coffee next to each other, this guy is real cool. Next time the waitress walks past he orders a glass of ice. She's happy to do that for this dude because he is so cool. He mixes the milk and coffee with the ice and stirs with his little spoon. Looks good. The old man that owns the cafe walks up to him and says, 'I see your in the Navy". How did he know?

A: he was wearing a naval uniform.

Anyone know similar nonsense?