Greedy Fool; noun.

What happens when you reach the end of Central Processing, and instead of rushing through the exit: decide to wipe the last Blinky off your tail before it can chomp your neck off.

And then you realize you just swapped Chaingun -> Rocket Launcher instead of Chaingun -> Shotgun, and blow yourself back to the starting point.

Yeah. Not quite my brightest moment ever. Well, I'm sure the look on my face maybe. On the upside the Spectre didn't survive the blast either.