probably the worst one i ever had was a job on a guest house for one of tom petty's heart breakers
he would let other musicians stay in the guest house from time to time and never really used it full time.
then he rented it out to a couple full time and the sewer was plugged.
couldn't clear it, so i camered and located the spot about 95' downstream.
borrowed a helper from the plumber that referred me. after digging down and exposing the pipe, the inlet and outlet were over 4'' off. 1 pipe was under the other and the dirt was holding in the stoppage until i touched it with my shovel it was as thick as a milkshake
needless to say, the borrowed helper added his own puke to the flooded ditch
i finished the job myself