Time spent on internal reflection or contemplation whilst wearing a safety helmet. Especially among motorcyclists, firemen, scuba divers and astronauts.
She was deep in helmet time.
Save it for helmet time.
It'll come to me during helmet time.
Houston we have a problem.
What time it is when Chris and Steve are working above your head.
She wouldn't have been hurt, by the falling ball, if she knew it was Helmet Time