Yellows are always watchful for the patrolling blues. Here the Yellow
sneaker spots the Blue and slips into the rocks. The Blue, comes up to the
rocks, and sits there for about 1 minute (edited out of the clip), waiting
for the intruder to show his face. When there is no action, the Blue slips
in after the Yellow, but comes up empty as the Yellow jammed out the back
door entrance.