Touched a nerve there, interesting

From The Colonel's Website

A phrase used by members of the Colonel's Regiment when someone has got upset by something. Examples of this would be when Moules gets frustrated with the disgruntled boys for their endless applications, or when Poop finally flips out owing to too many cries of "Poopy" from the disgruntled boys. The disgruntled boys, usually shocked by such an explosion from Moules or Rupert, reply with "Touched a nerve there, interesting!". This is apparently more annoying than the thing itself. These days, the disgruntled boys prefer to use the less offensive "Don't have a cow, mate!" in an attempt to appease Rupert and Chris.