You might see this phrase in a police report, insurance letter, repair estimate, or a rider's account of a wreck: the bike lost traction, then suddenly caught again, throwing the rider up and over. That is a highside crash. It happens when a motorcycle's rear tire slides sideways and then regains grip abruptly, snapping the bike upright and pitching the rider off, often to the opposite side of the original slide. It is generally more violent than a lowside crash, and it can cause serious injuries because the rider may be launched into the roadway, another vehicle, or a fixed object.

In practical terms, the label matters because it helps explain how the crash happened and why the injuries may be severe. A highside can point to sudden loss of traction from gravel, oil, braking errors, or road conditions. In Alaska, freezing rain in the Anchorage bowl can leave glaze ice on roads and bridges, creating exactly the kind of sudden traction change that can trigger this kind of wreck.

For an injury claim, identifying a highside crash can affect how fault is argued and what evidence matters. Skid marks, bike damage, helmet scuffs, witness statements, and roadway photos may help show whether another driver, a dangerous road condition, or a maintenance problem played a role. Under Alaska's pure comparative negligence rule, Alaska Stat. § 09.17.060, a rider's compensation can be reduced by their share of fault, but not automatically barred.