Your attorney's trying to get him to crack, his attorney's trying to get you to crack. As kml says--been in a similar position--stay calm and stick to the facts from the script you and your attorney create. When I was in a similar position, I repeated excerpts from my rehearsed script and didn't recollect much else. Memory is fallible and I was coached that guessing or trying to remember extra details could only bite me. The person judging the case indicated frustration that people share fault in most cases--but in the end the other's testimony admitted to wrongdoing and mine did not. The verdict went completely in my favor.