Corrected entry: In the scene where Robert de Niro blows the door of the safe, the safe door (which is several inches, with big bolts) is blown across the room. But the fragile aluminium boxes inside are not affected by the explosion at all.
Rooster of Doom
17th Dec 2001
Correction: Actually, since the boxes are presumably not watertight, they would have filled with water and received approximately the same pressure wave inside and out, resulting in little deformation. The big door received all the force on one side, which is why it was blown off.
Rooster of Doom