Well, it's said a poor excuse is better than no excuse. However, your stating that you were not expecting it is indication enough that a refresher course is in order. Since you were inspecting under the tables, you know you were receiving hazardous duty pay at the time (so I will let you slide out of the class this time. But Philpot and I believe it would be wise of you to reset the radar to a lower position.............bottom of the table level comes to mind........so you won't miss any further warnings.
xo HM