Invite this guy to your next party

The tie-dyed shirts really make the Mentos thing work work….


  1. #1 The Science Pundit
    September 5, 2009

    What was the heavy gas he was using? Argon?

  2. #2 John Moeller
    September 6, 2009

    In other times I’ve seen the heavy gas demo, sulfur hexafluoride was used. Stable but very pricey.

  3. #3 Abstruse
    September 6, 2009

    Details on the rapidly expanding foam, anyone?

  4. #4 james
    September 6, 2009

    The foam is called ‘elephants toothpaste’. There are lots of videos and info online.