This brings back great memories, between catching frogs and thrashing water snakes around my grandparents pond. They had one bull frog about as big as my head, one day I finally wrangled it, I picked it up by one leg, and it made the shrill eat most horrifying scream, scared the bejesus out of me. Not something I'd suggest replicating, just a forewarning.
Haha! Yes, bullfrogs are no joke! You and that frog both shared an unforgettable moment together! I never was able to get my hands on one as big as yours. I tended to stick to the little unintimidating guys :) Thanks for sharing the memory!