Riley the dog is a bit of an adrenaline junkie.
How do we know this?
Because he followed his owner into an airplane... and then followed his owner out of that airplane before it landed!!
We've never seen Justin Bieber hamm it up like this! LOLz!
Biebz tweeted a pic of his new, adorbale partner in crime, Pac, and the little guy is simply to DIE for.
His furry companion seems to be a great travel companion too!
Me and #pac on the road
So ADORBz!!!! We MUST babysit one day!!! Does RIGHT NOW wurk for you, Justin?
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[Image via Twitter.]