Falkirk's hopes of securing runners-up spot in the Scottish Championship suffered a blow after conceding a last-gasp equaliser in a 1-1 draw at Dumbarton.The Bairns looked set to move five points clear of third-placed Hibernian when they took the lead in the 65th minute.Mark Docherty was sent off for blocking John Baird's attempt with his hand and the striker blasted the resulting penalty into the roof of the net.Dumbarton went close to equalising five minutes later, but Danny Rogers produced a smart save to deny Christian Nade as he ran through on goal and Kevin Cawley put the rebound just wide.The 10 men kept battling and were rewarded deep into stoppage time when Christian Nade was brought down by Rogers and Garry Fleming converted the second spot-kicky of the match.