Dang I wish my physics teacher was this cool.
Liquid Nitrogen poured in a soda bottle, bucket of warm water, and ping pong balls.
What do you think will happen? 
Click the link and watch the video.
Wow!!!
Feel the science!
That was pretty cool. That dustbin must have gone four feet in the air.
I wish we could get approval for gas bombs like that in our class. 
A Dry Ice bomb is similar. Mythbusters has made several.
Same idea. Dry Ice in water creates Co2. Gas builds up in the capped bottle. Big boom.
I like the physic teachers better. He’s demonstrating a liquid (nitrogen) converting to a gas. The bucket of warm water speeds up the process.
My college physics teacher was also cool. His best trick was always the last day. He inhaled helium and proceeded to talk to the class, illustrating a principle we just talked about. If you could picture John Housman acting as professor Kingsfield in the Paper Chase—that was prof. Taylor. Brought down the house.
The video’s already gone, replaced by a message about a claim of copyright infringement by Plymouth.
They have no business doing that if it was a video a student took with his own camera (mentioned in the article, I suppose they are now confiscating all of their cameras)…
Don’t worry, there are others.
I knew what this was going to be about by the title! I saw a similar thing years ago on some kid’s TV science show. There was a guy dressed as a giant rat, anybody remember what it was called? They used a bin full of water and no ping pong balls. The bin stayed on the floor but it seemed like every bit of water shot straight into the air.
Captain Kangaroo would be so proud…
Professor Walter Lewin takes the cake.
You say guy in a rat suit*, I say Beakman’s World.
*And it’s worth pointing out that within the context of the show, he (Lester) wasn’t actually supposed to be a giant rat…he was always just a guy in a rat suit, with no explanation given as to why. A nice little absurdity inserted into a children’s science show.
I’m not sure it was student video. It had multiple angles and the cameras were obviously set up on tripods.
Liquid nitrogen always makes physics class cooler. 
I take issue with calling this one the best ever, though. I think that honor remains with Professor S, who was my undergrad physics prof. He had lots of quick, effective tricks for getting concepts across, but his best stunt ever was particularly theatrical.
He walked into the lecture hall a bit late one day, wearing heavy gloves and carrying a frost-covered bucket that trailed fog everywhere. He set the bucket on the table at the front of the class and looked around to make sure he had everyone’s attention–which, of course, he did. Without a word, he began opening drawers in the table and pulling out various objects, starting with the classic rose, and doing the dunk-and-shatter routine with each one.
After he finished shattering several objects, he took off a glove, removed his ring, and toweled his hand dry. Satisfied with his preparations, he dunked his hand in the liquid nitrogen, yanked it out, and slammed it on the table. A number of people hid their eyes, and a couple even screamed (or yelped, at least). He just grinned and pointed at several of the people up front who had flinched and said, “You didn’t do the assigned reading.”
Then he lectured us on the Leidenfrost effect.
We used a 2 liter bottle and made a liquid nitrogen bomb once at a lab where I worked. We flipped a metal wastebasket over it and stood back
Five minutes later were were debating if it was going to go off or not when it finally did. The metal wastebasket was ripped apart and the pieces went hire then the two story building we were standing next to.
Moral of story: be careful when doing this. Its a pretty powerful explosion and its hard to time how long it will take for the pressure to build.
I’m all for blowing things up, but frankly I question the educational value of this demonstration at the university level. Did anyone in the room not know what was going to happen?
Balance, a variant on that one involves sleight of hand, a glove and a hot dog sausage inserted in one finger…
I’m guessing it was done for an Open Day or Awareness event (so, a group of A-Level or younger school students thinking of studying physics at Plymouth). Still filmed, but not as part of a lecture course.
Si
Richard Feynman and the bowling ball (with two associated stories): http://www.langston.com/Fun_People/1994/1994ABX.html
That’s some hot water right there:
Kinda surprised I’m the first to notice.
Oh, and the video was removed by the user, not for copyright infringement. I’ve seen this happen a lot, actually–not every YouTube poster wants the views. I also believe that some people would take it down on principle for it being shown in the Mail.