It takes a real genius to work with this equipment in flip flops.Cant say I saw one person who actually knew what they were doing. But didn't need those cranes anyway.This situation can only happen when the excavator lost it's own power ! Usually this machine can help itself out of the sink hole with help of it's own powerful arm.Gotta love the safety shoes they are wearing in that vid, ive gotta get a pair of those when working on building sites, and not to mention the safety hat aswell, that'd be great at stopping things from crushing feet and skull if dropped, must tell my manager at building sites to get them.