The only movie Tom Arnold and the late Robin Williams made together was 1995’s “Nine Months,” by all accounts a below-average comedy about a surprise pregnancy. The movie clocks in at 28 percent on Rotten Tomatoes, while Metacritic doesn’t even have an entry for it. Maybe the best thing the movie produced, as Arnold revealed in a HuffPost Live interview Tuesday, was the strange diet he and Williams followed during filming.

“We ate only — and I don’t recommend this — turkey and mustard every day for two weeks,” Arnold told host Josh Zepps. “And then he’d found these Chinese herbs that would not be [considered] cheating on our sobriety plan called ma huang. This was way back in the day. At about the end of the second week, he came into work and said, ‘Hey, did you think you were having a heart attack last night?’ I go, ‘Yeah, I thought I was having a heart attack every night. I thought it was part of the diet.’ He goes, ‘Oh no, let’s stop taking this stuff.'”

Williams tragically committed suicide this past August. Arnold said every nice thing said about Williams in the wake of his death is fact.

“When people pass away, people go, ‘Oh, he was amazing, he was whatever,'” Arnold said. “He was everything and more.”

Watch the full HuffPost Live conversation here.

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