(2014) irrelevant nitpick: you can dig upwards. You undermine the face of you trench, let it collapse, then climb that pile and repeat. It is laborious and uns

(2014) irrelevant nitpick: you can dig upwards. You undermine the face of you trench, let it collapse, then climb that pile and repeat. It is laborious and unsafe, but it'll get your excavator out of the hole.