I will call even if was a full table with AA. I know I can have a bad beat but if this happen in beginnings of the tournament surely il call everybodyAbsolutely call every time. Against 4 players your equity is still about 60%. You're there to try to finish in the top positions, not to avoid finishing in the bottom positions. You won't get a better opportunity to 5x your stack and set yourself up for a deep run.