My turn. Four years ago, I got the bright idea to do a 40 mile mtb ride with temps in the mid nineties. Being confident that half of the ride - of the out and back - was shaded, I would be fine. Was not thinking too clearly about the other half of the ride in direct sunlight. Fortunately at the half way point there were restaurants and an outdoor shower. I had drank both my tall water bottles by the time the half way point arrived. So had a very large fruit juice and refilled the bottles with water. Fully clothed in biking kit, I stood under the shower on cold as I could stand it for the return trip, which just happened to be uphill. Think I dried out in less than 10 minutes.

I made it 3/4s of the way, with both water bottles empty (yup two bottles in 15 miles) but I live where the temps in the 60s are preferred. I know I could have made it home, but only on fumes and after almost passing out a week earlier on a road ride, decided to abandon. There was a town off the rail trail I was using with a Starbucks, so headed there, made the call of shame/stupidity and enjoyed a vente overly sweet mango something. Mrs RSbob showed up in 20 minutes with a bike rack, a wry smiles and the AC on full blast.