A story from the 1978 VH tour with Black Sabbath surfaced where it appears Dave engaged in a friendly cocaine snorting competition with Ozzy Osbourne which resulted in Ozzy coming up missing and a tour date in Nashville got postponed...
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The night before the tour stopped in Nashville, Tennessee, Roth and Ozzy decided to stay up until nine in the morning doing blow to see which one of them would faceplant first. Score one for DLR for having the balls to challenge Ozzy to a competition involving drugs without dying in the process. Somehow, both Roth and Osbourne made it to the airport, got to Nashville, and checked into their hotel. Later on when it came time to head off to sound check, Ozzy didn’t show up.