A high school junior in upstate New York had a heart-stopping morning when a runaway truck barreled straight toward him — and smashed into the back of his stopped school bus.

Jeremiah Rutkowski, 17, stepped out his front door in Madison around 7:15 a.m. on April 7 to catch the bus when the terrifying crash unfolded just feet away, according to WKTV .

“I just figured if that thing’s not going to stop, it’s either going to hit the bus and something’s coming flying at me — or the entire truck is coming flying at me,” the teen said.

Jeremiah was almost to the bus when the pickup rear-ended it.…