years ago i was messing about with oxy accetalyne,i lit the welding torch adjusted it for a neutral flame then stubbed the torch out leaving the gas comming out of the nozzle,i got a bin bag and held it over the nozzle untill it was inflated,i used masking tape to seal it and took it to the bottom of the garden,luckily i lived out in the sticks at the time and didnt have neibours,i put the bag at the bottom of the garden about 50yds from the house and workshop,i used a piece of masking tape for a fuze lit it and stood just in front of the workshop,after about 5 seconds there was what i can only describe as an explosion,i felt the shockwave (nearly knocked me over),i heard a noise from the workshop,went in and found a load of tins of paint etc had came off a shelf on the gable end,the shock must of rattled the garage wall,it was block built as well,the bin liner wasnt either fully inflated,if he had a proper ratio mix under pressure,im supprised there was anything left of him!!,i think if i remember as an explosive its not far behind c4 scarey stuff!!!.