Expired, cheap, and surprising

I found an old camera at an antique shop.  It had no metering so I used sunny-16 with a roll of film gifted to me that had been in a box somewhere for a long time, unrefridgerated.  It was a roll of Kodak Gold 400.  I didn't wait for it to warm up, I took it out of the freezer, popped the canister, and loaded it.  I got it developed at Walgreens and I can't believe the colors when it was exposed correctly.  Even the grain in some cases wasn't too bad.