Complex sentence: Crawling out of the van, Trip peers into the other car and hearing radio reports of what's to come, calls to the unresponsive driver standing with his back to Trip, who only briefly looks at Trip and start running past Trip, down the street.
Split into simpler sentences: Crawling out of the van, Trip peers into the other car and, hearing radio reports of what's to come, calls to the unresponsive driver, who is standing with his back to Trip. The driver only briefly looks at Trip and start running past him, down the street.