How can I blow up a pressure cooker?

Is there anything I can cook with a predictable delay in a pressure cooker?

anything? not usualy used in explosives?

I reported this thread to my local police. They will contact your police after they get the warrant for your personal info. Bad time to be making jokes like this. Cops have to check every possible threat and people like you waste their time. Cuz Im pretty sure your not a threat and just a troll.