Whatever you do, if it is a genuine release of your emotion, who is anyone else to judge? It's what you do, it's who you are. Trying to tell someone else how they "should" feel in a particular situation is impossible.
I've seen people laugh in tragic situations, weep in happy situations, and faint in stressful situations. I've even personally applauded to a performance on TV, while sitting alone in my family room. How crazy is that? It's how your body works, it's physiological.
If it's genuinely how you feel, your reaction to any situation will be automatic and uncontrollable.