As John drives into a filling station, he notices that some spilt petrol has caught fire. He stops, gets out of his car, and runs to the car-wash bay. He grabs hold of a bucket full of water, hurries over to the fire, and empties the bucket on it. Because burning petrol can float on water, John's action does not extinguish the fire, but rather displaces it to a spot directly under Tom's car. Tom has a powder-based fire extinguisher in the boot of his car. He gets it out and manages to extinguish the fire. However, his car is extensively damaged already. Tom wishes to institute a delictual claim against John. 

Discuss only, but in detail, whether there was fault on John's part ? Explain