A few coffins over time (HUM), first one I saw I didn't know what it was in the dim light, as they are covered in muslin cloth, fortunately a loader told me right before I was about to step on it to reach my bags.
Tractor parts, flowers for a florist show.
Full pallets of newspapers, the normal plane had gone tech and we were called in. Our plane didn't have floor rollers so each pallet had to be trolley jacked in.
Another airline I worked for, in the pax underbelly I recall they once transported live bee hives, on another occasion a live leopard for the zoo. The pilots sent a acars that the cockpit smelt of pussy...