"It was actually really scary and fun... It's very binary, I feel. It's either they're gonna attack you, or they're not... The craziest thing was then getting in the cage with a great white shark, which was even more scary... You're trapped in there and then the shark comes... It doesn't feel totally safe, really... The whole thing is a very surreal experience, but I think I would do it again." Actor Ben Stiller enjoyed swimming with sharks during a recent trip to South Africa.