Ad for security glass uses real money

 Svn Images 3Mmoneyglass According to 37 signals, the money sandwiched between the shatter proof glass in this bus stop ad is real.

Link (Thanks, Itchy!)

UPDATE: Gerald says: a note on that bus ad; it's in downtown Vancouver and the top layers
of money are actual Canadian $20 bills and the rest are fake, like the
ones in movies. There's still a hefty chunk of cash in the ad and the
bus shelter is actually monitored by video by the ad agency (which is
conveniently located across the street).