Correction: I can understand Bernie getting tired of listening to others. If he had been speaking, he could have stayed awake. Everybody need a break now and then. Ruth Bader Ginsburg has done this too, and she remains an icon.
Hellary can take that photo of sleepy Bernie and make an ad out of it.
Here’s my suggestion-—
https://www.youtube.com/watch?v=Y-H9BOIYhgc