The Bin Laden Company?
During the fifty years I was building projects, I was fortunate to not have one catch fire. Had a flood from a broken pipe ruin some carpet and drywall, but no fire.
That being said, I saw this happen to others any number of times and for the most bizarre reasons. Saw completed large stores burn a number of time partly from excessive schedule pressure contributing. Extension cords can short, pilot lights can ignite fumes from paint and solvents, sunlight can make something highly flammable burst into flame. I have seen temporary lighting be at fault.