Have you or anyone you know:
1. ...ever experienced a prophesy (vision or dream) that came true?
I have made statements that have come to pass, but I was completely conscious, not in any kind of altered state. I have known other people who have had dreams that came true.
2. ...dreamed of a stranger, then actually met them later?
I have not
3. ...seen a wonder in heaven? (including UFO's)
I'm not totally sure what that means - a physical wonder or had a vision of heaven? I have had flashes during worship services about eternity, but only very briefly.
4. ...seen a "sign" on the earth?
I have a broad definition of "sign" so I see them every day.
5. ...experienced knowledge of another language without ever having studied it?
I have not. But I do know a lot of Spanish.