split second

To be aware of, 'I'm on the ball here so this is what we trained' - but you have to think that in a split second.

The lawyer who represented his family at his inquest, Gareth Naylor, tells the BBC that in a "split second" of an adult leaving the room, the toddler climbed on a bed and fell.

What excites me is the maverick who gets you out of your seat and when possession-based football takes a rest for a split second and something magical happens.

"I've never heard a sound like that in my life - it came from the sky. In a split second, the fighter jet flew over my head and crashed into the school building."

"Then, just a split second later, as the shelling began again, I heard a burst from an automatic rifle," Zelenin said.