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.
C'est à dire que si quelque chose arrive -- et je n'ai jamais vu ça, mais je n'ai regardé que pendant 20 ans -- si quelque chose arrive, elles pourraient arriver à la rescousse.