People laugh when they are nervous and when they are trying to hold back something deeper too, I think.
It is wonderful to arrive at this place where you are.
To me, this is something therapy can do... it can free us, relieve us of anger and hatred and hurt enough to see beyond where we have been able to see. The hurt and anger and hatred are real, and of course justified, but they also color our perspectives, and we deserve to see the panorama.