"Look what I just took off Hughes in the science block!"
His boss quietly calmed him, put the offending weapon in his dsk drawer and ushered his subaltern out the door. Embarrassed, he turned to the candidate, still sitting in mid-sentence: "I'm most awfully sorry for that interruption; I hope it hasn't disturbed your train of thought too much."
The dramatic one smiled laconically and murmured: "Don't mention it. I assumed it was a coup d'etat." He got the job.