TSLA is up 10% in afterhours trading - earning report due shortly. Can any of you TSLA hawks explain this spike?

Thanks in advance - I don't really understand how afterhours trading works (are there transactions or is it theoretical?) Also not sure why it would close at 208 then spike to 228 minutes after close.

Submitted November 03, 2015 at 04:35PM by tenorsaxman11 http://ift.tt/1Ncb3LZ