Do these things work or not gives us a trip report please

I always love cooking with pot and these are simple and easy that i can show my buddies
DE.Db33t Reviewed by DE.Db33t on . Firecrackers so Im about to make some, want to clear up on some things so is 20 min in foil at 300 degrees the general rule of thumb? and do you physically have to wrap the whole cracker up in foil? Thanks for help I hope this works. Rating: 5