An example of the demotivational posters at Despair.com. A University of Iowa College of Business professor says motivational posters with inspirational messages that adorn many of our workplace ...

(MoneyWatch) I have always hated motivational posters ... have high ideals and deep thoughts -- the great ones usually do. It's just that those grander ideals and thoughts don't come to them ...

Actor Shia LaBeouf impersonated a lunatic motivational speaker at Central Saint Martins in London as part of BA Fine Art 2015 ... he demands the viewer "Just do it." As great as LaBeouf's speech ...

In this particular video, LaBeouf is seen yelling a clichéd motivational speech at the camera, enhanced with extreme gestures. Do it. Just do it ... another performance art piece, the actor ...

James Franco has put a potty-mouthed spin on an intense 30-minute motivational speech ... a pep talk to London fine art students where he agressively yelled "Just do it!" while flexing his muscles ...