Black Sabbath’s Geezer Butler recently talked to ”Far Beyond Metal” podcast, where he opened up about the time late singer Ronnie James Dio stepped in to replace Ozzy Osbourne, calling the replacement ”strange”.

Here’s what Butler explained:

“It was at first when Dio came in. ‘Cause Ozzy would be running all over the stage and getting clapping, getting everybody up. Ronnie was much more serious, more into his, putting his personality over kind of thing. […]

”(Ronnie and Vinny Appice) brought massive enthusiasm back to the band. We were on our last legs kind of thing after Ozzy went. We were almost thinking about breaking up.

”But Ronnie brought incredible enthusiasm with him; He could play guitar and bass and put over his ideas instrumentally as well as vocally.

”He was brilliant to write with, too…Vinny was the same way. Ronnie knew him and asked him to come down and rehearse with us, and he fitted in straight away, so we carried on.”