Taking suggestions on what to shoot with the camera...
Do a comparison of cheap glass fuses and HRC fuses when connected to full 240V mains.
The HRC fuse will be pretty boring, but the exploding glass fuse should make a nice video.
Instead of abusing mains, you can also use a large capacitor bank.
Flying sparks (the glowing/burning metal particles), always look great on highspeed. If you don't have a large high voltage capacitor for exploding the wires, use an angle grinder for generating the sparks.