Uhura puts the Klingons on hold listening to Greensleeves for 10 minutes, causing them to destroy the Enterprise in sheer frustration.
Ok this has never happened as such, however in Star Trek VI Uhura does put the Klingons on hold while trying to impersonate other Klingons with the bridge crew hurrying to translate the langauge in the background.
Starfleet remove red jumpers from the uniform code, after which the mortality rate of senior crewmembers on away missions increases dramatically.
Red Jumpers were removed from the uniform code somewhere between 2269 and 2279. In The Next Generation era it’s actually command that wears red with security now wearing mustard.
There's a bizarre time-warp incident that has nothing whatsoever to do with the 20th century.
This has happened many times – most notably with Captain Braxton in Star Trek Voyager – he was from the 29th Century! Oh and don’t forget ‘Yesterday’s Enterprise’ – another bizarre time-warp incident having nothing to do with the 20th Century, instead an era just decades ago and the previous Enterprise.
Doors on all Federation starships inexplicably stop going 'pssht'
It’s not inexplicable, no doubt the Enterprise doors are powered by some sort of hydrolics which would explain the ‘pssht’ noise.