There is nothing remotely humourous about being Secretary of State for Defence.
It really isn't funny being Defence Secretary with two aircraft carriers on order but with no planes to fly off said carriers.
Neither is it funny when your department sacks 42 Warrant Officers by email. Even less funny that one WO received the email while on active duty.
It definitely is not a laughing matter when your department sacks 100+ trainee flyers, some within weeks of qualifying as fully fledged pilots.
Perhaps, the Right Honourable Dr Liam Fox, will find, this impromptu air guitar excerpt of "The Dambusters" theme tune, less than funny.
Guess the anonymous MP might have been bored? His next performance might include a grovelling apology accompanied by an impromptu version of "Sorry, seems to be the hardest word."