This week is Shark Week on the Discovery Channel.
And the marquee event of this year’s Shark Week was Olympic swimmer Michael Phelps “racing” a great white shark. I say “racing” because Phelps did not race an actual shark. Instead, he swam against a CGI shark based on a previously recorded shark.
To create the CGI, the show had to record a shark swimming in a straight line for a pre-determined distance. And, since great white sharks are not known for their trainability, the job to lure the straight-line swim fell to this guy.