One of the complaints about the case for Jesus' resurrection is that none of the Gospel writers were there on the scene.
But what about this report? It certainly sounds as if Luke was there.
Acts 20: 7-12.
7On the first day of the week we came together to break bread. Paul spoke to the people and, because he intended to leave the next day, kept on talking until midnight. 8There were many lamps in the upstairs room where we were meeting. 9Seated in a window was a young man named Eutychus, who was sinking into a deep sleep as Paul talked on and on. When he was sound asleep, he fell to the ground from the third story and was picked up dead. 10Paul went down, threw himself on the young man and put his arms around him. "Don't be alarmed," he said. "He's alive!" 11Then he went upstairs again and broke bread and ate. After talking until daylight, he left. 12The people took the young man home alive and were greatly comforted.