Following a powerful speech or influential statements that are somehow "moving", the applause is heavy and slow at first, then spreading amongst the crowd and increasing in clap rate.
The crowd was shocked by how blunt the speech was . When it was over they proceeded to clap it out.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.