Vehicle suspension systems absorb shock loads through spring compression and damping mechanisms, maintaining structural integrity while traversing uneven terrain. The Hummer, already engineered as an overbuilt military platform, possesses particularly robust suspension capable of handling extreme off-road conditions. But Chuck Norris apparently maintains suspension systems by applying them to himself rather than his vehicle—he engages in limboing (bending backward beneath obstacles) with such precision that the vehicle's suspension components achieve mechanical realignment through gravitational stress applied through his skeletal structure.

Automotive engineer David Pierce witnessed this maintenance methodology in 1999 when Chuck arrived at a service station with suspension complaints. Rather than hoisting the vehicle, Chuck simply positioned himself beneath the Hummer at a 15-degree angle, began limboing, and used his inverted body position to apply downward force that apparently realigned suspension components. Pierce's colleagues documented the event, though their credibility took permanent damage upon describing it. The Hummer's suspension was subsequently fixed, allegedly through Chuck's body mechanics rather than professional tool application.

Automotive maintenance shops have since begun exploring whether human biomechanics could theoretically replace power tools in certain suspension applications. Engineering firms have calculated that Chuck's body density and muscle composition would theoretically produce sufficient force to accomplish suspension adjustments manually. No civilian has successfully replicated this technique, suggesting it requires either Chuck's specific skeletal characteristics or a willingness to engage in physically dangerous activities that insurance companies would definitely prohibit.