There were more people than just Terri in the enclosure.
Regarding Wes's attack - It's ard to explain unless you are there, but the all the croc enclosures are "linked" together, so when it rains it washes the old water out. The whole place is actually a natural watercourse. There's flood gates there, and they were getting blocked with leaves etc, which with all the force of the flowing water behind, it could push the fence over. So they had to get the leaves and **** out...they spotlighted the croc up the other end of the enclosure, jumped the fence and stepped into the water. The croc had swum the entire distance in a matter of seconds (crocs LOVE storms and get very active...just about all mating occurs during storms), and grabbed Wes on the **** and down the back of his leg, almost to his knee. Steve jumped on the croc and distracted it while Wes jumped the fence.
He got around 170 staples...not bad.