In 2010, the bridge began periodically opening to bikes and pedestrians.

Each window periodically opens to throw out random objects (a phone, shoe, etc.) Every once in a while a dog may come running along the bottom edge of the screen.

As the crustacean periodically opens and closes the mandibles the teeth move apart and close together.

Bottom blowdown involves periodically opening valves in the mud drum to allow boiler pressure to force accumulated sludge out of the boiler.

Then when protests followed, police periodically opened fire on the demonstrators.

In all Multiplayer modes, the barrier separating the two players will open periodically.

Its list therefore opens only periodically.

An uneven aged forest is the result of periodically opening the canopy.

This part narrates about the children game where the player periodically opens and shuts his eyes.

The authorities have been periodically opening black bin bags with human remains in them.