That is to say, if something happened, and I've never seen anything like this happen, but I've only been looking for 20 years, if something happened, they might all come out if they were needed.
Es decir, si algo fuera a ocurrir, y jamás he visto algo así ocurrir, pero solo he buscado durante 20 años, si algo ocurriese, todas podrían salir si fuese necesario.