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!!
Rihanna is on vacation in Hawaii and she seems like she's been having a blast.
Aside from lounging around in seksi bikinis and smoking really "funny" looking hand rolled "cigarettes" she did some pretty adventurous island activities.
"Swimming with Sharks is one of my favorite things I've ever done"
We're sure it would be amazing but also terrifying.
And we're sure Rihanna has done a lot of stuff in her life so it must be pretty awesome for her to have said it was one of the her favorite things she's ever done.
Though, we'd still prefer to just lay on the sand.
[Image via WENN.]