xkcd #3232: Countdown Standard
Title text:
Anyone who is caught counting 'three ... two ... one ... zero ... GO!' will be punished with a lifetime of eating only ISO standard food samples.
Transcript:
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Source: https://xkcd.com/3232/
It always tickles me when I come across people with enough comms etiquette to not say "Go" unless they are giving a cue. "I'll wait for you to say G. O. before I do anything"
My favorite thing is the ability for most if not all hands on comms to have the most random conversations and then stop cold as soon as "standby..." Is heard. Then after all the cues have been given, the conversation picks up exactly wherever it left off.