Went out for an early morning ride this morning. Noticed when I got to a junction near my flat that the bike sounded funny, a bit like how it sounded when I let it run a bit dry. Took note, and thought that I better check it when I stop at the meeting point with my mates. Running late, so in a hurry, blasting down the motorway. Start seeing some smoke coming out the rear, but can't quite tell where it's coming from (if it's definately my bike). Came up to the lights, loads of smoke. Looked back at the rear. It's covered in oil, all over the rear tyre Someone had taken out the oil plug (found it on the ground when I got back to the flat, purposefully taken off and thrown into the corner). So lucky to still be here and not in pieces on the motorway.