Test Match Special World Cup memories
India v West Indies Desktop scorecard
A sell-out crowd at Lord's turned up to see what many predicted would be a West Indian walkover and Clive Lloyd's World Cup hat-trick.
Lloyd and his men had had a scare earlier in the tournament when they lost their first ever World Cup match to the Indians after 10 successive wins.
But lightning could not strike twice, especially after Lloyd won the toss, put India in and saw Sunil Gavaskar dismissed with the score on two.
India never got going and when they were all out for 183 the writing looked to be on the wall.
The West Indies had to score at only just over three an over, and even after Gordon Greenidge fell early there seemed little to suggest that they would not achieve that target against India's battery of medium-pace bowlers.
But then Madan Lal found a rich vein of form dismissing Desmond Haynes, Viv Richards and Larry Gomes and from 50 for one the West Indies were floundering on 76 for five.
Jeff Dujon and Malcolm Marshall tried to get the innings going again but Mohinder Amarnath broke their partnership of 43, dismissing both men, before closing out an unexpected win with his third wicket of the day.