Was this a bad river play?

[Ralle]

The table had been mostly pretty aggressive for a while. Including raises from EP with hands as weak as AT (!), and my opponent had not struck me as the kind of guy who would limp with JJ in that spot. But then again, he might be mixing it up. I felt JJ were possible, but not likely. The hands I did fear were 66 and 75 (I definately think he might have played a 75s in EP).