No fun in that at all!
Been there twice myself, and it surely is an effective wake-up call.
First time my own fault...
Was in a hurry after restoring a car completely with full repaint, and didn´t mount the safety hook before driving the car, leaving it to rely solely on a swiftly mounted and poorly adjusted latch...that cost me a new hood and a repaint of the roof.
Second time i suspect i hadn´t closed the hood correctly/completely, and the safety was all that held it. Fortunately it happened on a gravel road at relatively low speed, so nothing but a hinge was damaged.