I'm not sure that's practical. A lot of people interrupt you or think you're finished when you look at them during pauses or blocks. When people conclude you're finished and hear an entirely different message that you did not intend, things can get really bad. Imagine if the judge, Howie Mandel, who said "good enough doesn't explain what we just heard" got a block at the most inconvenient timing. It'd be like this. singer: "there were times when I was kid where I was like... I'm not good enough." Howie: "good..." other judges: "WHAAAT? EXCUSE ME?" Howie: "NO! I was going to say..." live audience: "Fire Howie! Fire Howie!"