That woulda been scary! That happened to me once when I had the 4.3L in, -35 degrees cruising back home from Ottawa, had the cruise set at around 80mph, coming into town I tapped the brake to kick the cruise off and it kept on going! Did the same thing, pressed the clutch in and it engine rose up and started bouncing off the rev limiter, slammed the gas pedal and it freed up. Scared the bejesus outa me!
2000 Chevy Silverado RCSB LS6 5 speed, LS6 short block, 317 heads, LS6 intake, Lunati 220/224 .575/.575 112LSA cam, Edelbrock Headers, CTS-V accessory drive, Nelson Performance Custom Tune.