The valve stem blew out!
After you kick that cold one down I'd get your RV into a tire shop and REPLACE all those rubber valve stems with stainless steel valve stems before heading out with it! :C
Been there done that. Day after I bought my first used MH I had one blowout on the road and 2 more flats the next day while driving in Houston with 112 degree temps. Long running time and high heat just melted those **** rubber valve stems. Tow truck driver was the one that pointed out the rubber valve stems where melting. Pulled into the first tire shop and had them all replaced with stainless steel ones.
We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us.