I was using a purple and green DC04 which was mine and I accidently stepped on the cable cus I wasn't holding it, and it fell out with loads of sparks and the electric 240 volt cable nearly hit my foot! I nearly died.
I had a DC03 standard and the cable had a naked wire, I tried to fix it and it sparked!!!
I had a DC01 standard YDK and it was burning it and it sounded like it was drowning and then it stinked and was loud!!! and smoked a little bit.
I vacuumed up ash with my DC04 outside in the garden without a filter, I also left the post filter in, when I checked that, it was all dusty so I used with out any filter, turned it on and the whole garden was full of smoke!!! In the morning i turned it on, and it died.
I had a blue and purple DC07 allergy from a carboot, my Dad helped me fix it as the motor was burnt out, we cleaned it up all shiny new, the brush was hairy, motor airy, cyclone hairy, filter hairy everything!! we took the motor out and tried to run it, my Dad told me to switch it on and it smoked SO MUCH!!!!!!!! and had an electrical smell, after that we just left it and got a new motor for the DC07

My Dad ordered the 1600w motor for me non genuine but cleaned great and was quieter!