Nah man, that's a rowing machine. The seat is meant to move, he just has no idea what he's meant to be doing.
You might say "Wait, but why? How is that like Rowing?", but you're thinking of the wrong kind of boat - you're thinking, regular dinghy with oars, but rowing machines are made to emulate Racing Shells, aka, the kind of boats they use in Rowing competitions. Racing Shells have sliding seats, like a rowing machine, because it allows the rower to put in more power with each stroke, as well as allowing a longer stroke.