Most back injuries are caused primarily by poor lifestyle choices rather than the lifting of heavy objects. Cutting down on unhealthy foods like consuming Maccas on a daily basis whilst staring at a screen all day is going to pack on the pounds quick smart and put undue stress on the spinal discs. Besides which if you lift any heavy object (including a pinball machine)
correctly then a back injury shouldn't be a possibility of occurring.
Nice guys. Got a few laughs. Thinking I should have called the thread contact cleaner related injuries. We better educate more about this. Otherwise anyone with a pinball machine and a can of cleaner will be on the terror watch list for making home made bombs! 
Classic stuff!
No doubt the AFP have been alerted and are tracking the forum as we speak.
