[Magnus]

I know a producer who once faked an entire string section, for an advert. Booked the studio, laid out the chairs, mic's, music stands, had the assistant leave some newspapers and coffee mugs out, etc...
Client turns up ... "Oh, you just missed the string section being recorded. It sounds great, check it out.."
Plays back pre-recorded synth string part, from a JV1080.
Client "Yeah, the real strings really help the warmth of the track!"
Producer included their fee as part of his invoice ....

That guy is my new hero!