I guess you are one of those? In that case get the two others with you and decide a new rule: nobody leaves the retrospective before they've spoken. Warning:

I guess you are one of those? In that case get the two others with you and decide a new rule: nobody leaves the retrospective before they've spoken. Warning: might backfire, one team I worked with scheduled meetings right before lunch so they wouldn't stretch out. It backfired: these meetings continued into our lunch every single time until I think I or someone else started just walking out as lunch started.