People yawning like they ate 12 packets of viagra

Alright I'm not gonna make a big deal out of yawning,I don't really have problem with it.

BUT in my opinion it looks silly and quite retarded when you and your friend are just there, sitting on the sofa and then your friend stands up, and then stretching all of his ass cheeks muscles in front of your face and making a huge RAAAAAAWRR!! like they a dinosaur.

Dont get me wrong, I really DONT mind it but I hate the types of people that have to Scream 1200decibel 805hz sound and making ridiculous poses.
But that only goes to some people.
Is this normal? (I reckon not, lol)