You should mind your own business sometimes.
Mitt is walking down the street when he sees a group of people, who are doing a drug deal, quietly talking on a side street.
Mitt wants to know what's going on.
Mitt walks by the group and glances out of the corner of his eye while making efforts not to be noticed.
Mitt walks up to the group and asks them if there's a problem that he can help with.
Mitt sees the drugs without catching the group's attention and quickly leaves.
The group turns on Mitt, sees him as a threat to their deal, and assault him.