Thunderbolt and Lightfoot1974

Thunderbolt:
In small-town banks, they leave the telephone off the hook in the vault at night so the local operator can listen in.

Lightfoot:
People walk into these banks with paper sacks, fill 'em with money and walk out. Anybody can do it.

Thunderbolt:
Bullshit. The newest bank vaults have walls of reinforced concrete five feet thick, backed by six inches of steel. The vault door is stainless steel-faced. It's an inch and a half of cast steel, another 12 inches of burn-resisting steel, and another inch and a half of open-hearthed steel... A vault door has 20 bolts, each an inch in diameter. Eight on each side, two top and two bottom. This holds the door into a 16-inch steel jamb set in 18 inches of concrete. It's crosshatched by steel bars running both vertical and horizontal. This door is precision-made so you can't pour nitro between the door and the vault. If that isn't enough, there's microphones, electric eyes, pressure-sensitive mats, vibration detectors, tear gas, and even thermostats that detect the slightest rise in temperature. Still interested in banks?

Lightfoot:
I knew you weren't a preacher!