Is this a nutty play at a wild table?

[PoorLawyer]

I would think if you are going to make a nutty play, the best time is 5th when you both catch your possible flushes and your spades are almost completely live. He bet his, so either say you have one too and it is better or get out of the way. If he calls you have to pray for your miracle 4 and hope it comes up...nice praying.