Yawn

A yawn was a reflexive action that could indicate either fatigue or boredom.
In 2368, Data mimicked a tired 's yawn, to the boy's satisfaction. ()
In 2369, Q, disguised as a Bajoran waiter, dissuaded Julian Bashir from spending time with Vash by yawning to convince him he was tired too. () 
In 2370, just before initiating a dream program, Data yawned on purpose. () 
== External link ==
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Category:Physiology
Category:Sleep