rex-craft7

Hello, I'm having my first graduate school interview in a few weeks. After I finished undergrad, an extra year for extra classes and working and etc, I left home and went on a solo backpacking trip for about 7 months around the world (actually I'm still traveling). I did not mention this in my essays or application when I applied. The thing is, I'm not quite sure how to bring this up in the interviews. There's obviously a gap of a few months so I will have to mention this either way. I personally found the experience to be life-changing, however, it has nothing directly to do with the program I'm applying to (biomedical animation/illustration). Should I be downplaying this experience since it wasn't mentioned before? How should I bring this up? Is there a way I can use it to strengthen my interview?