Battletank equipped with Super Laser.
The Super Laser is a laser weapon used by the United States Military. It appears in the 1987 cartoon episode Attack of Big MACC, and has been placed on a battletank. It can cut through all elements known to Humankind.
During a test to cut through a thick steel block, the lightning strikes outside, causing the Super Laser computer to accidentally open a Time Portal, allowing MACC to slip through.