I had a weird experience in church many years ago, and need help getting some type of explanation...

So, I was probably about 8 or 9 at the time, and I was in church with my sister and grandma. The priest was doing this weird thing where he would place his hand on some of the churchgoers' head, and I think it was to somehow "Cleanse" them of sin or something. I was in line to do it, and my sister was before me. The priest put his hand on her head, and she stumbled and fainted. (This was happening to a few people, and they had volunteers all around to catch people who fell)

When it was my turn, the priest put his hand on my head, said some prayer, and I didn't faint, but became EXTREMELY dizzy, like I was about to pass out. I didn't need anyone to catch me, but I can't forget the dizziness feeling. I am in no way a religious man, and believe there is a logical explanation to everything, whether we know what it is yet or not. Has anyone ever taken part in this, or can explain just what was going on?