Source: James Crombie/INPHO

SEAN O’BRIEN LASTED just 25 minutes of today’s Six Nations clash with England after suffering a suspected concussion.

The Tullow Tank came crashing into England’s George Ford and lost his balance while attempting to get back to his feet moments later.

Despite wanting to continue, O’Brien was helped off the field by team doctor Eanna Falvey and replaced by Tommy O’Donnell.

Source: James Crombie/INPHO

Source: James Crombie/INPHO

Source: James Crombie/INPHO

Source: James Crombie/INPHO

Source: Dan Sheridan/INPHO

Here’s the incident: