Pressure cookers cost real money tho, you can buy ten times more pipe for the same cost.
Efficiency and all that.
But, to try to get 12" pipe for a Claymore? No. The steel in the cooker is a different thing all together.
And that daily mail article about just add some TNT and borrow a cup of blasting caps from the MILF across the street....
Well, that aside, they missed the point about the lid. On or off?
I say OFF. It was a directed weapon so it has to be off. General boom, ON. Leg cutters, OFF. I think they used the pot to cook or place the explosives in. Acetate Peroxide or black powder. For this black powder is easily strong enough. It propels musket and cannon balls. You don't want the BOOM. You want the SPRAY
So, cooker on a board to hold in vetical and the lid is behind board to back breech the blast. You only need a milisecond of breech block. That's how the lid ended on building in fair shape, I think. No shrapnel scaring as someone pointed out.
The lid pranged backwards againt barrier and the stage left and I bet it prange that light pole toward the finish line.
From there it had a good vector and trajectory to end up on the top of the building down the street, behind the blast.
If the lid was on the top, it could not have been found there, I don't think. Not in the claymore position.