Hello, everyone. I had a question about black holes, but this is also a thread for other people's thoughts about black holes. I was wondering, could a spacecraft use black holes as a catapult sort of propulsion? For example, it's well known that modern-era spacecraft will use temporarily orbit a planet, hit the periapsis of the orbit, then burn their way out of orbit, with the extra speed given from hitting the periapsis. My question, again, is, could a spacecraft do this some type of manuever with a black hole? And where would they go about it? On the edge of the black hole's event horizon?