"Try to imagine a geeky version of famed salesman Ron Popeil.
Keep Popeil's exuberance, keep his pitchman savvy and keep his
verbal overflow. Then erase his age, sturdy frame and Ronco Food
Dehydrator and replace all this with a young, lanky kernel engineer
hawking something called DTrace, and you have Bryan Cantrill.
"Cantrill is one of three Sun Microsystems Solaris engineers who
developed DTrace over the course of several years. As far as we can
tell, he is the most energetic member of the bunch..."