WALTHAM, MA - In April, Waltham High school put on its annual senior prom mock car crash to show students the horror of what happens when drinking and driving takes the life of a student and how many people are affected, from parents, to students, to first responders. Waltham Fire dispatched Engine 7, Rescue 1 and Medic 1. The students are clearly impacted when they see the hearse arrive; reality sets in.