Motion Difference Annotation

Left / Right convention: "left" and "right" are always from the person's point of view — not yours. In the illustration, the figure faces you and waves with their left arm.

For each pair, watch the Source, Target, and Overlap videos, then tick every body part that moves differently between source and target. Multiple body parts may be selected. Each batch contains 30 pairs — refresh the page to load a new batch.

Source (A)
Target (B)
Overlap (A & B)
Which body parts differ between source and target? (multi-select)

Notes on grouping: Arm includes shoulder, upper arm, forearm, wrist, and hand / fingers. Leg includes hip, thigh, shin, ankle, and foot / toes. Torso includes the pelvis, spine, chest, neck, and head. Tick a part if any of its sub-parts moves differently.