Rolling on the floor

It is normal for people to exaggerate their sense of happiness (”I feel like I’m on top of the world” - Is it not true that everybody is on top of the world except for those working in mines?!) and despair (”I’m very down right now.” Down as in under a couple of blankets?) Sometimes people even exaggerate their feelings of hope.
Laughter is something I have always viewed as that which can easily be exaggerated. Need proof? I have come across a lot of people who write out in the chat box or an email response “ROTFLOL” whereas they are all perfectly normally seated on the chair, as against their extravagant claim. Rolling on the floor, indeed?! In a novel that I am reading now, John Le Carre describes a night manager of a Swiss hotel practicing his smile carefully in front of the mirror, just before he is set to welcome an important guest into the hotel. He believes no guest would want to see a hotel manager baring all his teeth like a chimpanzee..!
So you keep laughing. But next time around, if somebody says they find me very funny, and then laugh out loud, I just think I might be a bit sceptical!