United Kingdom, Aug. 5 -- Sir Paul McCartney's ex-wife had a confrontation with a man who told her she was taking up too much room with her false leg.

Heather Mills, 57, shared the incident in a video posted to social media, filmed from her seat on a South Western Railway service.

The former model and activist, who was married to Sir Paul for six years, said the confrontation began when a man complained about her stretching out her leg.

Unaware that one of her legs was prosthetic, the passenger accused her of taking up too much space.

Heather lost her left leg below the knee in 1993 after being hit by a police motorcycle in London. Since then, she has become a prominent campaigner for amputee rights and prosthetic technology innovatio...