Furthermore, the bootstrap variance estimator usually requires more computations than the jackknife or the BRR. Chelicerae can be divided into three kinds&colon; jackknife chelicerae, scissor chelicerae, and 3-segmented chelate chelicerae. Nash then hit Triple H with the Jackknife Powerbomb. Nash pinned The Barbarian after a big boot and a Jackknife Powerbomb. The jackknife is a linear approximation of the bootstrap. The jackknife pre-dates other common resampling methods such as the bootstrap. Nash did not listen and gave David a Jackknife Powerbomb. Fatu became the first wrestler eliminated after Diesel performed a Jackknife powerbomb on him. Stevie tried to explain this to Nash, only to receive a Jackknife Powerbomb. Recently non-indigenous species have become established including the Pacific oyster and Atlantic jackknife clam. Angle won the match after reversing a Triangle Choke into a jackknife cover. On non-articulated trains couplings may break and the carriages may jackknife. Diesel recovered and performed the Jackknife power bomb on Hart. Cena, however, countered it into a jackknife roll-up. Normal trains could split at couplings and jackknife, as seen in the Eschede train disaster.