Pressure Cooker

Pressure Cooker:

'via Blog this'

(Note: Never try this, for reasons which will become obvious in a moment.)

Fill the cooker with oxygen up to 5 PSI, then pump in fluorine until it starts escaping through the safety valve. Put the vessel over an open flame until it reaches 700°C (That’s °C, not °F. Yes, this will probably set off the smoke alarm.) Now, pump the hot gas over a liquid-oxygen-cooled stainless steel surface.

The procedure here is a little tricky, but if you do things right, the gas will condense into dioxygen difluoride (O2F2).

And that stuff is awful.

Indeed. /evilcackle