DeLorean Time Machine

From HallsWiki

A time machine built into a DeLorean car, as seen in the Back to the Future movies. Time travel is made possible by the flux capacitor, which is powered by 1.21 gigawatts of power, and the DeLorean needs to be travelling 88mph. In later movies, the DeLorean is able to fly, due to modifications made in the future.

In the Halls, Chaomancer Omega and Slovman used a DeLorean time machine to travel back to 1944 during Back to the Future Week, but ended up crashing it into Darkhawk Lake when they returned to the present time. It is presumably still at the bottom of the lake.