Does anyone know about Section 421 row 3?

[celts32]

I think they might be those free standing seats that seem to not be connected to the stadium. I spent a season in row 2 of 419 which is near there. The floor was metal and there was a walkway directly behind my seats and this was below the steps that go up to the upperdeck. basically at the same level as the concourse. I thought they were very good seats.