I play at church, two services every other Sunday. This Sunday, as I'm getting ready to play second service, my strap falls off the neck-side strap lock. This suddenly drops the neck and puts all the weight on the tail strap button, and the screw hole was all but stripped, and with this sudden weight, just came out.
It was easy to get the neck button back to normal, although this does argue that the Grolsch/Dalco solution is preferable to Schaller straplocks, but I won't go there too far, because the urgent issue is the second button. Here, I pull out the trustly Leatherman and screw a new hole in the already-tortured end of my Tele. I tell the worship leader, "Hold on until I finish", but I was not a reason for delay.
I did notice before too long that my high E was halfway to F, but I could lay out and tune up with the tuner pedal during the first verse and come in strong on the chorus, so I count it as a win.
A Leatherman (or other multitool) is great for these kind of last-minute things. Don't leave home without one.