Cast Away

Cast Away was popular movie on Earth. When Lt. Colonel John Sheppard was trapped in a Time dilation field he said into his radio, "This is Sheppard. I'm pretty sure you can't hear me, but I don't have a volleyball to talk to, so what the hell." This is a reference to this movie, in which Tom Hanks is stranded several years on an uncharted island, and spends his time talking to a volleyball he names Wilson.