Accidental purchase?!?

You know the 10,000,000 shares or so on lvl 2 that sit on the bid at $.01. After hours sometimes they are the only shares sitting on lvl 2. What if a retail trader accidentally hit the BUY button and bought the shares. Would this trade go though? If the stock was $100 the trader would instantly be out $100(99.99) per share he bought. Would this happen? Has this happened? Just curious, thanks guys.

I think you've answered your own question - how would he buy them 'after hours' when the electronic system is closed?

There is still after hours trading.

I'm pretty sure it has happened, although not necessarily in exactly the way you describe.