Anxiety and laughter are really the same phenomenon, but seen from different points of view.
Shudders of horror, and shudders of delight.
Tears of grief, and tears of joy.
They are the same shudders and the same tears, but they have a completely different meaning.
Life is a matter of oscillation and vibration.
The question is, How are you going to interpret that?
Is it tremble, tremble, tremble
or laugh, laugh, laugh?