First thing that comes to your head

Bug

 

Millennium

 

Crash

 

Johnny Cash

 

Ring of Fire

 

Krakatoa

 

Science Teacher

...my dad's science/trig teacher once yelled it out in class... lol

 

Caldera

 

Cauldron

 

Boil, boil, toil and trouble

 

Eye of newt

 

... and toe of frog

 

toebeans

 

fingers and toes

 

Thumbs

 

Hitchhiking

 

Hitchhiker's Guide to the Galaxy XD

 

You sass that frood, Ford Prefect? There's a hoopy frood who knows where his towel is. =D

 

Beach towel

 

Something to use as a blanket when it's hot

 

Sun

 

Skull

 

Crystal, Kingdom of the

 

Oars

 

Rowboat