Not exclusively lifting, but i'm a delivery driver so the handling of some unexpectedly large items can come into play. For the worst carry, one of my customers got two giant bags of dog food shipped in. Not terrible in and of itself, but this was right after the cold snap last year so everything was iced over and they hadn't cleared their driveway...

Business customers can be a real bear, too. One route I work has a factory at the start which sometimes puts out more outgoing parcels than I can fit in the truck by itself. They're a marginal case where their output is too much for a carrier, but not quite enough that the district would consider allocating dedicated staff and a box truck for collections.