yeah my dad's a big DIY guy and rented a digger as well. He and I were doing fine until it started RAINING. And of course my dad rented it for the day, so there was no way he was going to stop. We sat out there digging through mud for about 2 or 3 hours and then it got stuck in one of the holes. The motor wasn't strong enough to turn it, and with my dad and I pulling, it wouldn't budge. Luckily, my mother summoned her Asian power and pushed on the other end. With the three of us, we were able to get it out. But that day was absolute hell. It was the first and only day I've ever experienced cramps on my wrists from holding that damned thing.
Good luck!