Beserk means to go crazy, like, "Jill's father went beserk when she came home past curfew."
The Beserker is SUCH a cool ride: there is nothing like it. It is a huge viking ship. You get it, and you need a very tight lap bar and a sholder harness, so this isn't your ordinay "viking ship" ride. First you slowly go back and forth, back and forth, and oh...what's this? Then you start to go upside down. Not just a quick flip like on a coaster. You HANG there. The worst is the one certain part, every time in the ride, you hang there, what seems like for eternity and you feel literally like you're gonna fall out. A lot of people think you have to be crazy to ride this and if they get on they think they will wet their pants but trust me, everyone is like that their first time on this ride. After you go on it once, you'll go on it again, and again. One thing: take it seriously when they tell you to empty your pockets! It is always raining coins on that ride!