Go on, what's the must eat there place for Manhattan?
You could try the Four Seasons - about $150pp depending on choice of wine.
The Gazpacho, Lobster & Fillet steak come highly recommended.
Taxi in to town can, if you are unlucky, be driven by someone who smells worse than a Parisienne tramp so, perhaps, the train is a better (and faster) option.
doing a Cave diving course
Ah, err, as a colleague once said to a rather punchy Ninja rider FO "Do you mind if I take out a whole life policy on you?"