A method of traumatizing a pair of adjacent vertebral endplates may provide a surgical instrument having a pivoting distal removable insert, a proximal handle portion, a body portion, and a linkage member positioned between the insert and the proximal handle portion, the insert having a first angular position relative to the body. First and second offset ribs each extend partially into the passage. A bridge-generated audio signal is generated for each of the participating endpoints based on a set of signals. The internal combustion engine system further includes: a first injector 12a that supplies the liquid hydrocarbon 22; a second injector 12b that supplies the alcoholwater mixture 21; and a third injector 12c that supplies the ether.