I don't know if it is Immigration exactly but coming back from a two hours visit to Niagara, Canada into the US over the bridge, officer asked me if I bought anything. I said, "Brownie and a Coke." He paused, looked me straight in the eye and said, "Special?" I paused, paused again, smiled slightly, chuckled and said, "No, chocolate chunks and walnuts". He nodded said, "Welcome Back" and waved me through. I laughed about it all the way back to Buffalo.