run for cover

An asteroid measuring as wide as 295 feet is possibly headed right toward Earth, but don’t run for cover just yet.

"Obviously, if someone pulls a gun, you run for cover," said singer Alex Rice.

The deadly shootout also illustrated how smartphone-wielding bystanders don’t always run for cover when bullets start to fly.

As people began to blockade themselves in shops and run for cover, some tried to hold off the assailant.

The gunfire caused the watching crowd, including the city's mayor and his family members, to run for cover.