Put a bike inner tube on your exhaust,

http://www.thepoke.co.uk/2013/07/24/what-happens-when-you-put-a-bicycle-inner-tube-on-a-car-exhaust/

Cant stop laughing ...............

+1, hahahahahahaaha

Brilliant!

(and that would be a perfect practical joke to play on someone - maximum embarrassment with no actual damage )

That's just too funny for watching at work

ive got to try this

As above but I wonder how many bicycles inner tubes will end up being cut up this next few days