Pacific Northwest Mopar shows 2013

stansblue72 said
Here's a video of a friend of mine winning the burn out contest a few years ago at the Arlington show. It's a chevy but he runs a 8 3/4 for a rear end.

http://youtu.be/Xwy1bC6meK8

Just curious to see if anyone knows...
To do a rolling burnout like this, does the guy have a line lock plumbed to lock out the rear brakes?