This has definitely happened (accidentally) during many a session of mine. Lol! Have to place your face strategically if you are tickling a bucking bronco of a girl!
If your lee is very ticklish, a tickle attack can quickly turn into a rodeo... or a krav maga demonstration.
One day an ex was straddling me, tickling my pits. My wrists and ankles were restrained, but I eventually arched my back so suddenly that I had sent her flying off the bed. Another time, it was another girl who fell from the bed during a tickle fight. And let's not forget the accidental kick in the crotch or elbow to the eye once in a while. Damn I am sure many of us have countless stories of the kind~
You can see that some of us are into bondage for very practical reasons rather than fantasy