That's what La Crescenta, California, resident Vaz Terdandenyan found out the hard way while walking and texting one afternoon:
"I got up this morning from helicopter noise and I was trying to see what was going on," Terdandenyan told KTLA.
"I was texting my boss that I would be late for work because something is going on, and I'm coming down the stairs and I see the bear coming up the stairs toward me."
"I turned back and I ran for my life. I guess running for a marathon came in handy because I was in shape to run away!"
Geeks Are Sexy has the video clip: Link [Embedded YouTube video]