On 18 June 2015 at 16:26, Anton Lundin <glance at acc.umu.se> wrote: > Here is the headmaster showing some pupils how a propper gas switch is > done: > https://www.youtube.com/watch?v=iw8pp7aqsZY > > to me it looks like he's doing underwater magic tricks. now ask him to do the same with a sea turtle on his back! lubomir --