Visible crew/equipment: When Otis tries to escape from Aunt Bee's clutches by hiding in the laundry service van, just as Aunt Bee has the driver open the van's back doors we can see the reflection of the moving boom mic in the left window.
Woman Haters - S1-E1
Visible crew/equipment: At the end as the boys were old men, the shadow of the boom mic can be see on the curtains behind them.