Coming through a toll booth on the way to work, give it some throttle, nothing! Look down at the temp guage, pegged right! I'm like WTF! Get over to the side of the road, kill it, open up the hood, coolant everywhere. Appeared to be coming out of the cap. Florida Road ranger showed up, borrowed some water, filled radiator, cranked her up, temp steady in the middle for about 4 minutes, so I get in take off nice and slow, made it about four blocks, there goes the guage, heading right. I'm pissed at this point. Pull over, same story, water everywhere. Tow it to local Ford dealer (thanks USAA). At this point, I'm thinking blown head gasket since I can't find any leaks. Turn it over to Ford, get my free rental, and head to work. Turns out the radiator had a hole. WHEEEEE. I was sweating. Being replaced under warrenty. The services guys were laughing about the warrenty running out in four days. Did test drive a Super Cab F150 while I was there. pretty sweet with the 5.4......