Live by the Code

He watched from across the street. He was pretending to read a newspaper whilst looking through some tiny binoculars from behind it, like a proper spy.
He saw the man punch in four digits on the keypad.
"7415. Bingo!" he muttered to himself.
He crossed the street, all the while looking around to see if he'd been spotted. He approached the keypad and entered the four digit code.
The keypad made a dissatisfied sound. He'd entered the wrong code.
Strange.
He tried again, slowly. 7. 4. 1. 5.
Wires burst from the keypad and wrapped tightly around his hand as some kind of gas sprayed out from between the numbers.
He was found slumped against the wall with his hand still attached to the keypad an hour later.