OK, have you ever seen an ad for the QuickGym ROM Machine (ROM = Range Of Motion)? The thing costs $14,615 and offers to get you into shape by doing a 4-minute workout.
The sales pitch involves some mathematical calculations, criticisms of "exercise experts" who don't believe the QuickGym claims, references to a few studies supporting the claims, testimonials, and a 30-day rental offer.
I read through the studies (they were remarkably short), and didn't come away convinced. Apparently high intensity interval training can be a time effective approach... but when the benefits are described as "small but significant" I begin to think I can find better uses for almost $15K. Didn't Carl Sagan say something about extraordinary claims requiring extraordinary evidence? And I'd add that extraordinary costs should deliver extraordinary results.
Does the QuickGym actually work? I don't know - but I do know I'd want a lot more evidence before clunking down almost $15,000. I'm sure there's a project leadership lesson in there somewhere...