The hour between 4:30- 5:30 am when the crack heads (not just crack heads, also late night drinkers and pot smokers) are getting in, and the crack workers are leaving to be at work early, or catching an early train to work.
Neighbor 1: "Did you hear that crack head next door hit his mailbox last night coming in at crack hour?"
Neighbor 2: "Yea, I saw him stumble to his door when I was leaving for work."
Neighbor 1: "You're such a crack worker."
Neighbor 2: "Better than being a crack head."