OP, in his desperate quest to demonstrate how he was so 'often' a victim of crime, told the court that on one occasion he had almost been shot at. He was able to remember which turnings he had taken off the highway to reach the restaurant car park (where he eventually stopped to call someone to pick him up), but was unable to remember who he called.
Nel said he must be able to remember who he called. He had just been the victim of a serious incident... one in which he could have died. OP still maintains he can't remember who he called.
The day after the 'almost shooting' - OP gets someone to pick him and drive him to collect his car from the restaurant car park. Nel asks who he called to drive him there. OP says he can't remember (again). So a very threatening incident happened to him. Not only can he not remember who he called to pick him up, but he also can't remember who he called the next day to take him to pick up his car - even though he would have been sitting next to the person chatting about it. This wasn't a split second interaction.
Nel tells OP he made the whole thing up and cannot 'remember' who he called because a) it didn't happen and b) he knows it cannot be verified due to him 'forgetting' who he called... twice.
OP has never reported all these occasions when he's been a victim of crime, including one where he was almost shot at. He can't prove anything because he's never reported anything (apart from a stolen watch, maybe). The point is that the one serious incident he could have reported - he didn't. Nothing is on record. And no one can verify that very 'frightening' incident, because once again, OP 'can't remember' who he called... twice.
This lapse of memory has nothing to do with being nervous about recounting the events that night when he murdered Reeva - it has to do with what Nel said. It didn't happen. That's why there's no record and he conveniently can't remember who he called... twice. He doesn't even state if it was the same person he called and sat next to for the journey home and back to his car the next day. That's because there was no person as there was no incident. That's the trouble when you have a pathological liar on the stand. Their credibility gets shot to pieces, and for very good reason.