Horrific Head-On Crash with Cement Truck Caught on Dashcam [VIDEO]

A Texas A&M professor is extremely lucky to be alive after this terrifying head-on collision with an out of control cement truck.

Dr. Guan Zhu recently had a dashcam installed on his Toyota Sienna mini-van. Here's video from CBSNews.com Web Extras with comments from Dr. Zhu.