A while back, while on turn-round in Stuttgart, all movement was stopped due big CB's, noise and light show. I asked if it was normal practice to down tools and watch the show. The ground agent told me it had become a requirement after two ramp staff where hit by lightning in the space of a month.
Inconvenient - yes, but the safety issue was positively (or negatively) demonstrated.
When mother nature is putting on the display in my backyard, I'm happy to watch... I don't want to be part of the act.