Big seems like an understatement. I know that the steep angle of the picture and the fact that you are further away from the camera than the trunk will distort perception, but the trunk at chest height looks wider than you are tall. The limb your on must be close to 24" and the one to the left, a fair amount bigger than that. I know those limbs are typically thicker than they are wide, but they're still HUGE. Even with a bobcat and grapple, that's still a lot of work for two men in a days time. Sounds like you and him have the teamwork down to where you don't have to have many audible. I hope you were able to drop the chunks instead of having to rope it down.