potty training gone wrong

Marissa is doing so good.  She went in her little potty 4 times today.  Then things went wrong.  She stopped wanting to go and she came screaming in her room with poop on her sock.  I went to the living room to check it out and discovered a huge pile of poop.  It was 1/3 the size of a pop can.  I took her in the bath and gave her a spraying down.  I threw her socks in the toilet and let them soak.  I started the bath and grabbed a paper towel to pick up the poop.  When I picked it up I ran back into the bathroom I traded the socks in the toilet with the poop from the living room.  It wouldn't even flush!