Out for an evening stroll, notice a wee bit of smoke up ahead and 3 wee street urchins standing beside the blazing bowl of an old tree.
"Here mister, this tree is on fire. We never done it, we just found it like this. It's classic isn't it?"

The same walk last night finds a pooper scooper bin and two pallets also spontaneously combusted at some point over the evening.
He was right though it did look classic.