I've used an old bit of carpet before, but after a while it soaks oil in and if your foolish enough to fire up the angle grinder, when it combusts into a 'reasonably' sized fire , you then learn a new dance. It involves a frantic stare, followed closely behind of shear panic , this leads onto trying to unlock the rear garage door , and with 8 thumbs, turning the garden tap on. What follows is the black mess leaving the front of the garage , as the fire is extinguished , followed by a pile of smoldering carpet being stacked neatly by the wheelie bin
Ex missus , walks out the house ' I can smell burning !'
Me: ' nah, I cant. Must be someone with a bonfire or something'
Ex missus ' Oh, I cant see anything upstairs in the house'
Me ' Don't worry yourself. What fool would burn anything in a housing estate ?'
Ex missus ' its weird, oh well, never mind'
Me ' I decided that want to put proper flooring in the garage for the Westie to park onto, I think the carpet was a bad idea'