Some might view blowing a three run lead as choking. Some might view it as bad luck. Others might view leaving a pitcher who had choked, or had just had some bad luck, in to give up three more hits as choking. Or maybe that was just bad luck also.
In my mind, if the team gives up four runs in a critical late inning, someone is accountable. It's a losing mentality to act like it was just fate or something.