Grenade?

[DaveK]

I was reading in Heart of the Beast about the 'grenade exercises' performed by Jim Inglis. It says

"Inglis would lightly depress the brakes to lock the front wheels, rev up the LT5 and release the clutch. Thick, acrid clouds of smoke soon enveloped the ZR-1, hiding it completely. He would then release the brakes, and the car would shoot out of the billowing clouds of smoke, leaving two smouldering piles of rubber."

Did Inglis have linelocks fitted and the writer didnt know about them? I would have thought that if the brakes were locked at the front they'd be locked at the back too. Has anyone ever tried this?

I guess you'd need deep pockets to pay for the tires