Ahmet Zappa, who now runs the Zappa Family Trust following the death of his mother Gail earlier this month (Oct15), insists the methods his dad used to tackle the ulcers he'd suffered since his teens brought on the prostate cancer that killed Frank in 1993. But the treatment wasn't all bad - it gave the guitar great "mutant" hearing skills that helped him perfect his unique sound.

"The strange side effect of that is an enhanced form of hearing," he explains. "He (Frank) literally was an X-Man; he got super powers!"

Cancer also claimed the life of Ahmet's mother on 7 October (15).