If a skateboard helmet is dropped once is it a replace job?

I remember going to Brygerriet for a comp, skated myself to death on the practice day and stayed really late. Was trying backlips on a kicker to block but caught my heel going backwards and cracked my head on the floor. Blood everywhere and soaked into my white tshirt and everything. I remember this horrified swedish mother shielding her tiny child from seeing me and saying to her ‘you know skateboarding is great, it doesn’t hurt and it looks a lot worse than it is’ before being hauled into an ambulance to have my head stitched back up. Good times