Once upon a time during layout construction I wanted to test my new at the time K-Line Santa Fe F7 ABA set.
I started it up with the Cab1 with the set on the tracks in front of me. As it slowly rolled around the tracks towards the other side of the room I got distracted and heard the awful sound of trains leaving the tracks.
I watched in horror from across the room the B unit and leading A unit crashed into some tools I forgot that I left on the track while the other A unit stayed on the track but still spinning it’s wheels ripping the traction tires to shreds.
After that incident, all tracks are now cleared off before I turn on a transformer and pick up a remote!