Silly only to pilots though......especially glider pilots..........

Yeah, speed is a bit high for a glider going for max L/D.
Could be doable in a real motorglider, depending on height AGL.

Reminds me of a story early in the U2 history. Pilot calls in from near Greenland(?) saying he had a flameout. Controllers start looking for rescue nearby. Pilot requests 70K MSL, controller states, "go for it"......pilot comes back with, "descending from 100K to 70k MSL.

Pilot made it back to land.

Specifics are foggy, but something like that........long time ago........