Those of you with TV licenses might have seen this last night.
I did and it was a relatively interesting science program which the BBC seem to be pushing as the next Tomorrows World (The Day After Tomorrow's World if you like). Anyway, apart from the ham-fisted presentation there was some good fun SCIENCE in there, not least of which was the 'supersonic vortex cannon'. Now although they say in the piece that the vortex is travelling at 200MPH, or approximately mach 0.3 and therfore distinctly SUBsonic, the final contraption was properly incredible.
Then this afternoon in a fit of boredom I decided to go on the website, and found a surprisingly mature video on the genesis of the 'supersonic' vortex cannon - worth checking out for anyone interested in crazy science.
PICTURE: SMOKE RING CAUSED BY VOLCANIC VORTEX CANNON, APPERENTLY
SEE ALSO: PAST TIMSPLOITS
