I remember that photo. Seen that with bulldozers too. You hand the operator a shovel and say "See you in a week" Then rush off and organise people machines and what have you.
Kein Plan überlebt den ersten Kontakt mit den Würfeln. (No plan survives the first contact with the dice.) Baron Mannshed von Wreckedoften, First Sea Lord of the Bavarian Admiralty.
The trouble you always have is that, sometimes, a tracked vehicle can bottom and pull itself out of the most amazing holes, it's all a question of do you run out of slop or height first.