Shark Attack Hammerhead

Two slides await you here next to each other and yet they are different. The two shark brothers have no curves, they always go straight, but over a few hills and quite quickly. One slide is closed, the other is open. Which do you choose?

Hints:
Size restriction: from 1.22 m
Age restriction: -no restriction-
Weight restriction: up to 113kg

History:

• 1997-2005: "Black Hole" and "Bonzai Pipeline", then "Hammerhead" and "Mako"