The roller coaster is X2 in Six Flags Magic Mountain in California. In So Cal there are a few major theme parks and each has a reputation.

Disney for the family

Magic Mountain for the rides

Universal for the sights

Knott's is affordable fun

X2 is an amazing coaster that has 3 axis movement and high G forces. It would make sense that the people with fragile bits are injured by what's basically a high speed centrifuge on rails.