Besides the obvious humor of hiding in your dad's car trunk when he thinks you're still across the country, let's thank good-natured prankster Brian Vogelgesang for doing his part to reclaim practical jokes from internet douchebags. No one gets punched or hurt, the prankee is not a stranger, the country is not endangered, and everyone ends the video happier than when it began.
Nope, this is just a kid flying home to the Chicago 'burbs for his dad's birthday, hiding in the trunk and waiting until his mom asks his dad to go get something from the car. And then scaring the bejeezus out of dad, who manages to get off a pretty quick dad joke in retaliation—"I mean, [it's] enough to be scared by somebody, [but] then to see this face?!" Zing!
And then they hug, because his dad (who is wearing the ultimate Dad Uniform, btw) is so happy to see him. Happy birthday, this guy's dad.