An ex-boyfriend who stabbed a man at a railway station after wrongly thinking he was his former girlfriend's new partner has been jailed for 19 years.
Michael James Daniels, 44, spotted them and the woman's daughter at Smethwick Galton Bridge, West Midlands in December, police said.
He followed the man onto the rails, stabbing him in the chest and back, puncturing his lung, liver and kidney.
Daniels was found guilty of attempted murder at Wolverhampton Crown Court.
He admitted grievous bodily harm, assault and possession of a knife.
Daniels, of no fixed address, was aware of the woman's friendship with the man, had already formed the conclusion they were in a relationship and stabbed him several times, British Transport Police (BTP) said.
It said the man jumped onto the tracks in order to get away from Daniels on 12 December and the woman also fell onto the line as she tried to pull her ex-boyfriend away, cutting her face.
Det Con Shani Plumb, from BTP said: "Daniels is a dangerous man and during the trial, the court heard he had a history of domestic violence offending and was carrying a knife on the day of the attack for 'protection' against people he thought would hurt him.
"Unfortunately, an innocent man became the victim of an extreme over reaction by Daniels who, consumed by jealousy and rage, jumped to the wrong conclusion with devastating consequences."