The electrons do bounce back and forth many times per second.

The bloom period bounces back and forth across the borders.

The club spent the next several years bouncing back and forth between leagues.

They keep on happening all the time, everywhere, as the stories bounce back and forth across the universe.

The Shadow was bouncing back and forth in his cramped compartment.

My eyes bounced back and forth between the two, ultimately settling on Roth.

Now, their mother spends the day bouncing back and forth between the rooms.

Each one bounced back and forth until it broke another atom.

This causes the particles to bounce back and forth between the Earth's poles.

I bounced back and forth into being able to make solid food choices to horrible ones.