Is that Zac Efron doing an insane dive at the Rio Olympics? No, it's Indiana's Michael Hixon. Since making his Olympic debut in Rio, Hixon has been the topic of Twitter for his striking resemblance to the celebrity actor. 

 Hixon won a silver medal alongside partner Sam Dorman in the men’s synchronized 3m springboard event last week in Rio 2016. Michael Hixon (born July 16, 1994) is an American diver. 

He competed at the 2010 Summer Youth Olympics in Singapore, winning bronze in the 3 meter springboard event, and is a world junior silver medalist in the synchronized 3 meter springboard with diving partner, Kristian Ipsen.