Rollback on a coaster: have you ever experienced this? 😳🎢 Block brakes also have the ability to slow the train but serve the additional purpose of being able to stop the train completely. This is required on roller coasters that operate more than one train simultaneously on the track. They act as virtual barriers between the trains running on the roller coaster, preventing collisions should one train stop along the course for any reason. Mecalodon at Walibi Belgium has 3 trains. 🇧🇪 #walibibe