Been hoovering up ashes from a fire? My boss admitted to 'tidying up' at home one day, which involved hoovering the living room. The benign cinders next to his wood burner looked ripe for removal….. except the sudden rush of high velocity air over the still-smouldering lumps of wood, once they were sucked up, caused a firework display inside his Dyson the likes of which I doubt he'd seen before. Going into 'WTF DO I DO NOW?!?!?' mode, he didn't turn it off, but ran round like a headless chicken until there was sufficent heat to melt the plastic of the collection tube, reducing the oxygen supply to his tiny towering inferno.
Stay safe out there kids 😉