Being a seasoned Londoner, Martin gave the body the "London once-over" - a quick glance to determine whether this was a drunk, a crazy or a human being in distress. The fact that it was entirely possible for someone to be all three simultaneously is why good-Samaritanism in London is considered an extreme sport - like BASE jumping or crocodile wrestling.

Actually I'd always thought he sat in the library with a slim volume of metaphysical poetry until the commissioner called him on the bat phone and summoned him into action. Holy paranormal activity, Nightingale - to the Jag mobile.

What's the biggest thing you've zapped with a fireball?' I asked. 'That would be a tiger,'said Nightingale. 'Well don't tell Greenpeace,' I said. 'They're an endagered species.' 'Not that sort of tiger,' said Nightingale. 'A Panzer-kampfwagen sechs Ausf E.' I stared at him. 'You knocked out a Tiger tank with a fireball?' 'Actually I knocked out two,' said Nightingale. 'I have to admit that the first one took three shots, one to disable the tracks, one through the driver's eye slot and one down the commander's hatch - brewed up rather nicely.

This I know for a fact: the reason African women have children is so that there's someone else to do the housework.

Not being invited in is one of the boxes on the “suspicious behavior” bingo form that every copper carries around in their head along with “stupidly overpowerful dog” and being too quick to supply an alibi. Fill all the boxes and you too could win an all-­expenses-paid visit to your local police station.

You know, your species [humans] has the most amazing capacity for self-deception, matched only by its ingenuity in trying to destroy itself.

Holy paranormal activity, Nightingale - to the Jag mobile.