Not exactly for airsoft shooters to follow since they'll just get hit by the ricochet but it is something for any gun shooter to understand when shooting through a vehicle windshield. Kyle Lamb shows how in this video from 5.11 Tactical... "There's a difference between shooting through flat glass and the curved glass of a vehicle's windshield. 5.11 Ambassador Kyle Lamb of Viking Tactics demonstrates the unpredictability of this situation and offers training advice should you ever experience this in a real-world situation."