Live Aid 13 July 1985
Live Aid was a dual-venue concert and an ongoing music-based initiative to raise funds for relief of the ongoing Ethiopian famine. The European concert was held simultaneously at Wembley Stadium.
When Bob Dylan broke a guitar string on his Musser guitar while playing with Keith Richards and Ronnie Wood, Wood took off his 000-18 Martin guitar and gave it to Dylan.
Ronnie was left standing on stage guitarless. After shrugging to the audience he played air guitar, even mimicking Pete Townshend by swinging his arm in wide circles until a stagehand brought him a replacement.
Thanks to @robbolger who pointed out this guitar that Bob bought at @normansrareguitars