I was in a jet taxiing and headed for a runway crossing. I could see out the window a plane on coming in to land on the runway we were about to taxi across. I

I was in a jet taxiing and headed for a runway crossing. I could see out the window a plane on coming in to land on the runway we were about to taxi across. It was clear from our speed that the pilots had no intention of stopping before crossing the runway. I could see it all unfolding and was actually considering taking off my seat belt and running to the cockpit. At that moment the pilot suddenly applied massive braking and we came to a stop just before crossing the runway as the landing plane sped down the runway right in front of us. Frightening.