WALTHAM, MA - Waltham High school put on its annual senior prom mock car crash to show students the horror of what happens when drinking and driving take the life of a student, and how many people are affected, from parents, students to first responders. Waltham fire dispatched Engine 7, Rescue 1 and Medic 1. Clearly the students are impacted when they see the hearse arrives. Reality sets in.