The Batmobile in "" combined style elements from various eras to produce a long, low vehicle with square lines, long fins and a blunt nose with a massive chrome grill that could have been from any time from the 1930s to the 1990s. This version of the Batmobile also vaguely resembled the Batmobile from the first two Tim Burton movies. Despite the obvious presence of the jet exhaust, the show frequently used sound effects from a reciprocating engine for the Batmobile's driving scenes. This, plus direct views of the engine (as seen in the episode ""), suggest that the car used a large piston engine for primary power and an auxiliary jet for high-speed acceleration. It also had an armored stationary mode to prevent people from tampering with the car when it was left unattended, though this was not as overt as the "shields" used in the 1989 movie Batmobile. The original Batmobile design had many design variants as well as Bruce Wayne's limousine, as seen in "Batman Beyond," which the producers referred to as "an upside-down Batmobile". It also made a cameo in the episode "The Call, Part 1", of the third season of "Batman Beyond".