OK you hotdogs...here is a diagnosis problem

["Robert H. Caron" <jca-productions@mindspring.com>]

I am not interested in approximate reasoning. A lot of you guys fail to 
nail the problem. Just talk around the periphery. I am looking for the 
precise cause. That means you have to stick your neck out and pick the most 
likely possibility.

Car: 84 5k

We drop someone off at LAX about 8 am for a 9:15 am flight from LA to NY. 
It's a balmy day, such as we are accustomed to in the City of the Angels. 
We turn off the ignition, open the trunk and remove some luggage. We close 
the trunk. Then we get back in the driver's seat and turn the ignition. 
Engine cranks but won't start. We try and retry, but the car won't start. 
The airport police are getting ansy, itching to finger their walkie talkies 
to call for a tow. We are getting very embarrassed. We open the hood and 
look around. Isn't that what you do when a car won't start? We see nothing 
out of the ordinary. Then we start to think. What events preceded this 
calamity? Maybe something to do with removing the luggage? So we open the 
trunk and slam it shut. We return to driver seat and turn the ignition. The 
car starts instantaneously. The airport cops relax their fingers on the 
transmit button. Some guy comes over and offers sage advice. "Must have 
been vapor lock, huh?" I shrug, give him a sheepish grin and drive off.

OK. Who out there can put their finger on the exact reason the car failed 
to start?