♪ i'm watching i'm watching i'm watching american television ♪ ♪ i'm watching i'm watching i'm watching american television ♪ welcome back, everybody. wildlife shows around the country. i still have -- >> yeah, a little bit. >> i can't help it. you know how i am with meatballs. wildlife shows around the country are incredibly popular and increasingly dangerous. we found one in which the trainers literally play and swim with tigers, which is a lesson for me. i had no idea that tigers could actually swim. >> this is crazy. at arizona's out of africa tiger splash, visitors are on the edge of their seat. animal experts are worried about consequences. abc's john muller has more. >> reporter: running at full speed, being chased by a full