My "machine" blew our fuses.
This got me laughing coz I have a similar experience 😂 mine was a phone charger which I "repaired" but as soon as I plugged it, our fuse blew up. I didn't even know the charger was the cause. My dad immediately called an electrician to repair the fuse and power was restored, then I plugged the charger again 💀 that was when I knew I have created an EMP grenade 😂