When Paul saw the light at Jesus‘ appearance on the road to Damascus, did he fall down to the ground? Yes, he did. The different verses in Scripture are simply describing the same thing in different ways. Acts 9:3-4 and Acts 26:13-14
Acts 9:3-4, “And it came about that as he journeyed, he was approaching Damascus, and suddenly a light from heaven flashed around him; 4 and he fell to the ground, and heard a voice saying to him, “Saul, Saul, why are you persecuting Me?”
Acts 26:13-14, “at midday, O King, I saw on the way a light from heaven, brighter than the sun, shining all around me and those who were journeying with me. 14 “And when we had all fallen to the ground, I heard a voice saying to me in the Hebrew dialect, ‘Saul, Saul, why are you persecuting Me? It is hard for you to kick against the goads.’
Of course, there is no contradiction here at all. If all fell to the ground, then Paul who was with the group of men, fell to the ground also. Just because one verse says all and the other mentions only Paul does not mean there is a problem.