One minute, you're wondering what was going through the minds of those who prepared the Qualcomm keynote of crazy, the next you're watching crazily hungover people pile into cabs and head back to places they call home.
Here are the five things that have stayed in my head, long after the gossip, the rumor and the wine had flowed away.
1. WHERE HAD THIS LADY BEEN? WHAT WAS SHE WEARING? HOW DID THIS HAPPEN?
This was around 10 o'clock on Thursday morning at the Renaissance Hotel, right at the Convention Center. A lady in a long, flowing dress and a fur gilet -- accompanied by a suitcase -- was standing in line to buy a coffee.
It was as if she was an apparition from another time and place. How had she got there? Where had she come from? What had she come for? What gadgets would she be looking at? My mind was full of such questions for hours. It still is.
2. WHY WOULD YOU CALL YOUR FOOD TRUCK "GET LUCKY!"?
The Convention Center area was adorned with several food trucks, disseminating instantly prepared food for the instantly hungry masses. This truck, though, offered a sense of slight digestional disturbance.
This is Vegas. It was as if the chef was tempting you to gamble on the quality of the food. It felt like a more precarious bet than any trifecta at Philadelphia Park. I mean, everyone loses in Vegas, right?
3. WHY DO PEOPLE ROLL THEIR LUGGAGE AROUND THE CONVENTION CENTER?
I know some attendees' budgets are tight. I know that some have to sleep on park benches or, failing that, at some motel halfway to Reno. But there is always such a crowd wafting down the aisles of the Convention Center.
Why would you roll your carry-on (or worse, your full-size) luggage behind you? It's hard to maneuver it. People trip up on it. And you look, well, forlorn, temporary, disorganized, lonely even. Couldn't you check it with your coat?
4. WHY DO SOME COMPANIES CREATE ASTOUNDINGLY UNBELIEVABLE NAMES?
Please, I am not trying to pick on this company. Truly. I am sure that it is run by very nice people. However, it had a relatively small booth, selling what appeared to be bits and pieces for phones.
I am sure they are very fine bits and pieces. But that name somehow made the offerings seem marginally less believable -- or marginally more Kansas City Royals than San Francisco Giants.
5. WHO ON EARTH WROTE THESE VERY LARGE WORDS ON NOKIA'S BUS?
There must have been giggles when this was conceived. They must have been male giggles. They must have continued for some time, because no one appears to have suggested that these words might not quite touch every attendee. They might even incite a slap.
Surely there might have been one or two people who were thinking that the people behind the fine Nokia Lumia phone were promising that you might have, well, sex, during a business meeting if you happened to clutch one of these gadgets.
But, but, why? How? Who? What for?