Which Princess Bride actor made Rob Reiner nauseous?

If your life hasn't been spent watching 1987's The Princess Bride roughly twice a year, then I honestly feel sorry for you.

Although, maybe not as sorry as I feel for Rob Reiner, who directed Princess Bride but had to leave the set whenever this actor filmed their part. Why? Because he would laugh so hard he'd feel like he was going to puke.

Side note: Let's get into it. Yes I know it's supposedly nauseated and not nauseous, but guess what? I don't care, everyone says nauseous, and they are both hard to spell.

Which actor made Rob Reiner's time directing The Princess Bride kind of terrible?

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