Quote from steve46:
I realize that its not going to make a lot of sense to the crowd, but shocks to the system tend to cluster. That means that there is always a significant possibility that a social, political or environmental "shock" will hit during market hours causing IV to explode.
If Neiderhoofer is short Vega, the only thing between him and the sidewalk is how quickly the lucky few can get a bid to cash out.
Personally, my own rule set says, when you have windfall profits, take them. I will bet there are a few others who view it the same way.