How Weird are Yawns?
The involuntary process of "Yawning". Opening the mouth and breathing in deeply, filling the lungs with air.
It's actually a very natural response to being tired that is generally triggered by sleepiness or fatigue.
But why do Yawns occur when you simply talk about yawning or see or hear someone else yawn?
Watch this and try not to yawn.. we dare you!