No it is not possible. The only possible scenario this could happen would be in a pronounced, and very very powerful updraft. Holding at 7000' over Genoa with a Cb at one end of the hold, we experienced something like it in a 737. Going one way around the hold, speed was taking off from 210 kts to over 250 increasing with the thrust levers back at idle. Going around the corner in the hold, the speed fell rapidly, thrust levers came up to near full thrust and speed was below 200kts. It was bizarre and we didn't hang around for long before diverting to Milan. But unless you have a peculiar weather phenomenon causing that effect, what you are describing would be a tremendously overpowered aircraft where idle thrust exceeded drag, and as such it would be unflyable and impossible to get down.