I think some progress bars are liars, like the ones with backwards-flowing animations that give the illusion of forward progress, or the ones that creep forward ever so slightly as if a page is still loading, even though the internet connection has clearly dropped.   Grr/sigh.,(reply>), @Herman Robak You're right but an elevator close door button is a poor example. The disabilities act in the US may have made them rare over there but the functional buttons exist quite commonly. A better example would be crosswalk buttons on busy intersections where the pedestrian crossing signal is set to always active in the rotation.,(reply>), They are called "pacifiers". Like the elevator button to close the doors; it may not do anything, the doors just close automatically anyway.<br>Speaking of pacifier, why don't soft drink dispensers have a huge button near the floor, labeled "kick here!"?,(reply>), My favorite vague "progress bar" is probably tied between windows 95 copy dialog where pages move from one folder to another, and the cable box reboot saying "setting up".... "Getting close"..... "Almost there". Jk those are the worst. The best are when they say in a game for example, "lighting torches, sharpening swords, assembling the king's men etc.",(reply>), @Crash Demons Yup, that's a perfect example of lazy programming!  Rounding down to the nearest integer or (round down to 2 decimal places) would be clearer.,(reply>), how about when it rounds up to "100%" despite not being done?<br>No, 100% means done, not nearly done. I think rounding up is okay except it should cap at at 99% and only go to 100% as part of a finishing transition (if you want to waste the user's time with one).