LOL. You are absolutely right!! "Bulls get some - Bears get some - PIGS get slaughtered." Take yer $$$$ and run. If it goes back up - re-assess.
Lately I've not traded until after 2:30, unless something big happens.
It never fails - the morning pop - then around 10:00 the reversal - often back to the open. I've done the same thing - I watch the morning open - if I'm up bigtime, I sell since I know that it will retrace. My day is done. Yes, I've seen it run back up again past my exit. There's always another trade.
"There's those who make things happen... those who watch things happen... and those who say 'what the f#&&** just happened"!!