It is very possible, "since it just happened to me", if you had a wind gust that allowed the drone to descend , once it starts descending fast enough, the drone starts falling through it's own column of air and the blades stall because the air stops going over the blades to create lift. The more power you give, the faster it drops. This happens with copters (which I should have remembered). Anyway, the only way to stop this is give forward stick and "get out" on the column of air.
Hope this helps,
Doc Pete
DJI tweaked the rotor geometry, and VRS hasn't been an issue since the P2.