Is it normal to find 'strange' things when removing drywall?
During a reno on a house, there was one bay of an interior wall about half full of 'stuff' that a pack rat had scavenged.
Pop corn, oats, spoons, you name it.
The house was about 80 years old at the time and the newspaper lining the walls under the plaster/lathe was proof. Knob and tube electrical.
Full 2 x 4 rough sawn balloon framing.