42.2 km in 3:45 is a fantastic feat! Bravo! (But why no water/food? I think it's healthier if you keep yourself hydrated during a long run, and perhaps at least one banana mid-run would do no harm either?)
When I run I sweat a lot (which is normal, considering the amount of energy that I use) and I quickly lose big amounts of water, if I don't replenish this water I'd be dying from thirst at the end of the distance probably...