[NYTyler]

So I am sitting at B&M casino the other day and it is heads up with me against an unknown. It's a difficult board, I have top and middle pair, but there is a potential straight out there and there are three hearts. I am thinking seriously of mucking my cards because of the myriad of hands that my opponent could possibly have but there is money in the pot and it is about $100 for me to call. We are on the river and I am feeling like I must be beat. Then all of a sudden he says as I am pondering a call, "I'll show you," right in the middle of my big decision. I immediately feel like he is trying to get me off of my hand. It just made me feel like he was holding squadoosh maybe and he just wanted me to leave. Is this a tell? When someone says something like that to you right in the middle of a tough decision? Last guy who said this to me I called and he had next to nothing. Anyone else had this happen to them several times before in the past? Is this a tell? Should I automatically downgrade someones potential hand as soon as I hear it? Does it mean anything when someone offers to show their cards afterwards? Is it like them asking you to fold?