While I don't agree with everyone making his own "elements suggestion lists" I wouldn't mind with a Explosive that releases high pressure and maybe smoke instead of fire.

Snitzi

Smoke bombs hehe.

Finalflash50

Who cares, they're awesome?

While I agree with some of the "fun elements" as I like to call them ( like fireworks , smoke bombs STKM even) I like the Original design of PT , a game in which you have apparently no "fun elements" but with those boring, or useless on their own elements ,combined and using imagination, you can create amazing things like the Processor , all the calculators, city sims , etc.

Heheh... My friends and I actually make smoke bombs. By Recrystallizing KNO3, castor sugar and NaCHO3, we can make one toilet paper tubes worth of "substance" fill up a whole entire park with opaque smoke.