Helium is a liquid at 4 K
My dad works with MRI machines which have liquid helium (1,700 liters) in them for cooling the supermagnets. If one of the tanks ruptures, the depressurization would slaughter you in seconds.
I've gotten to play with the supermagnets inside it before. I put a piece of metal inside it (holding onto it of course) and it literally felt like it was levitating in a zero gravity environment. Let go, and I would be in a looooot of trouble. I'm assuming if it got sucked in and destroyed something....each machine is probably well beyond $100,000.


Watch this:
https://www.youtube.com/watch?v=6BBx8BwLhqg