Grey Elephant Riddles

What's grey, has four legs and jumps up and down?
→ An elephant on a trampoline!

What's grey and wrinkly and jumps every twenty seconds?
→ An elephant with hiccups!

What's grey and goes round and round?
→ An elephant in a washing machine!

What's grey and highly dangerous?
→ An elephant with a machine gun!

What's big and grey and lives in a lake in Scotland?
→ The Loch Ness Elephant!

What's big and grey and has 16 wheels?
→ An elephant on roller skates!

What goes up slowly and comes down quickly?
→ An elephant in a lift!

What's as big as an elephant but weighs nothing?
→ An elephant's shadow!