Not on a ride...
But when I was younger, I was in the Scouts. we'd gone to a summer camp and for the first and only time I remember, we didn't camp, but stayed in dorms.
There were two dorms - one for the younger lads and one for the older. One of my mates just missed the cut-off point for the older dorm and he was in the younger dorm.
One night, I couldn't see him anywhere so went into the younger dorm to see if he was there. The door shut behind me and I realised I didn't know where the light switch was. As the dorm plunged into darkness, I heard this low moaning that went through me like the bass from a sub woofer.
I turned around to try and get out and, once I'd found the handle, tried to get out. the handle wouldn't budge and I was stuck in there. At this point, I was convinced that someone was playing a trick on me, so while I didn't particularly like being stuck in the dark, I didn't think it was anything odd.
The handle suddenly released and I got out. There was no one on the other side holding it shut - and I then noticed that my mate was outside. I kept an eye on the dorm and no one else came out.
A day or so later, the guy in charge of the campsite told us all these stories about the campsite and about the multiple ghost stories and sightings they'd had there. I could understand it if I'd heard the stories before hand, but not after.
FWIW - this is the only time I've ever had anything like this happen.