I kind of understand why the umbrella, but I have no idea why her bikini is showing.
Maybe so she doesn't get her lab coat messy?
Brace yourselves, here come the Photoshops...
Kari Byron needs Lab Goggles!
Kari Bryon + Suddenly Sid 7 from Ice Age
A shot to the head « Mind Hacks
Kari Byron loves Balloons
The MythBusters Behind The Scenes Tour: Adam and Jamie put this guy in a suit of armor and shot paintballs at him with a turret machine gun.
MythBusters James Bond