Science class can be a lot of fun, depending on how the teacher approaches the subject. If you were lucky, you were treated to a curriculum that included frog dissection and some fun with a Bunsen burner. No matter how cool your teacher was, though, there are some things that adults have to keep from the kids.

This video is the crazy science lesson that your teacher couldn't show you for liability reasons. The host runs through five experiments, and each one is more epic than the next. Starting with the sodium metal explosion, and ending with a "pyrotechnic pie," this clip is action-packed. It's from Grant Thompson, and while he posted it last year, it's a safe bet to say that it'll be new to most.

Check out this awesome clip below, and be sure to let us know which one was your favorite in the comments. When the craziness is over, be sure to share it with your friends on Facebook!