I guess a decent analogy would be like if you were a salmon swimming in a river that is increasing its flow rate as you move down. Eventually the water starts flowing so fast that you can't out swim it and you can't make it back where you started. If you were swimming next to a salmon friend that friend wouldn't suddenly get launched to oblivion when they hit the no-swimming-back point, you could watch them appear to swim normally next to you but neither of you can make it back up river. Your only option at that point is to keep moving in the direction the water is flowing. In the black hole case, just replace the water with space-time and its the same scenario.