Relegated to League One on Monday after Rotherham United's 1-0 win over Brighton and Hove Albion, Blackpool were hopeful of giving their fans something to cheer 24 hours later.
But Hall's unfortunate own goal in the 46th minute saw both sides share the spoils in a 1-1 Championship draw at Bloomfield Road.
Jamie O'Hara had given Lee Clark's men - who have won just four times this season and conceding a whopping 80 goals - a sixth-minute lead from the penalty spot.
Steve Cotterill's side - who have five games to play and are 13 points clear of third-placed MK Dons - took the lead through Kieran Agard in the 36th minute.
William Grigg got both goals in the first five minutes for Karl Robinson's side.
And Sheffield United sit fifth after a 3-2 Yorkshire derby triumph against mid-table Doncaster Rovers, Steve Davies bagging the winner 19 minutes from time.
