Times it would be inappropriate to quote any of the trailers...

[WraithDukat]

When you are dealing with someone in the witness protection program:

"You think you're safe? You are not."

When you're about to have sex with someone for the first time:

"Wont fit!!!"

When you're visiting a grave yard:

"I will walk over your cold corpses!"

When your boss asks for an appraisal of a new employee:

"I am better" - "at what?" - "everything"

 

[Gojira]

"I will walk over your cold corpses!"

I used to work in Nursing homes and I don't think that line would go well there either!

 

[Tiberius Jim]

Cumberbatch should MC some sort of race and instead of the usual starting phrase he should just ask "Shall we begin?"

 

[YellowSubmarine]

Harrison's phrases are rather universal. Hearing either "You think you're safe? You are not." or "I will walk over your cold corpses!" in any of those situations can be rather unnerving. Works in a library too. Particularly after watching a good Doctor Who two-parter.

 

[The Wormhole]

When your boss asks for an appraisal of a new employee:

"I am better" - "at what?" - "everything"

Pretty much my attitude towards most of my co-workers anyway.