Magic wand anyone?

He could be referring back to the days when apprentice mechanics used to get greased. Anybody remember them days !

I vaguely remember back in the day things started to get out of hand, at our HGV garage mechanics were stripped, filled with grease and dumped in the tranny van taken up town and thrown out to make your way back. 

Then there was the local Ford Main dealers, went a bit too far and got one of the apprentice mechanics and put the compressed greased air line inside his rear and killed him, the police got heavily involved then and the idiocy of garage mechanics was brought to a stop.