Your wording is a bit odd, but if I understand what you're asking, the requirement of a player to step on the helipad to trigger the end game only applies to collecting the three Snapshot colors. Adding the fourth fireball to the scar triggers the end of the game regardless of player positions.
That's exactly what was my question (I see... It was terrible late here). Even though that ends the game pretty early sometimes. Anyways thanks for answering so fast.