What about Saturday night, how many hours sleep, what did you have for dinner? You did say that it was warm and your effort was maybe a bit higher than typical. I'd consider being tired a more or less normal response to a hard day. I doubt the coffee had anything to do with it, but looking at what you ate, those 3 fig newtons might be the most nutritious thing you ate all day. Was that a burrito as in massive Chipotle w/ whole beans, or as in Taco Bell refried beans?