Steve had been recently fired from his dead-end job for leaving the cash register unattended for long stretches of time, (and was incredibly morose over his loss of income) so he decided to retaliate and annihilate that shop. Him and his accomplice, Roger were preparing for their brazen robbery.
As Steve and Roger were walking down the opaque road that led to Steve's old workplace he was thinking about how he felt that he was reprimanded too harshly for such a slapdash offense.
When they both reached the store, Steve began to think of the paramount consequences that his actions would have. He realized that the threat of arrest outweighed revenge from being exodused from his job. He decided to rebut the plan and head home.