Dear sir/madam,
Before I begin this letter in earnest, let me first entreat you to secure any and all nearby balls. Do not be unduly alarmed, but it is my solemn worry that the contents below may indeed cause you to trip all of the balls.
I am writing in response to your posting for [job] which I observed in [place where jobs are posted]. As outlined in the accompanying CV, I have a first class degree in kicking arse as well as a thorough self-taught grounding in taking names that I believe makes me particularly suited for this role.
Working in [where you work now] I have developed extraordinary reflexes and cat-like agility, as well as the ability to immediately tell when a human is lying to me.
Over my career I have worked constantly to deliver just shy of what is expected of me in a way that my employers can totally overlook. This has primed me for great success in the field of [relevant field], and is also the reason I am well regarded by both my peers and the demonstrably inferior as a highly skilled negotiator and taxidermist.
I hope that I will have the opportunity to interview for this position and shake your hand really firmly – I’ll be working on my utterly unnecessary vice-like grip until I hear word from your office.
Yours sincerely,
Bob T Gorilla