I had faced a similiar condition, dont know is it a ghost or some thing else.
This thing happened with me and friend hardly 6-7 month ago, we were 4 guyz each in thier own bike, headed to Nagpur from Raipur for a 350km Road journey. Past Rajnandgaon, approx 45-55km out of the city, we were riding at constant speed of approx 100-110 on a 4-lane, suddenly we passed a man with age around 55-60 standing along with his splendor. As we past the guy, he shooked his hand asking for help saying he has run out of petrol.
As we were crusing at high speed, it take little bit time for us to understand, after going hardly 200 meter we recognized we should help out the man, so we turned our bike back and ride back.
To our horror, the man has vanished from there along with his bike
, we had hardly taken 2-3 minute to return back to the same spot, the road is 4-lane without any trees, we cant spot him anywhere, the time at which this incidence happened is approx 2pm in the afternoon, and there's hardly any vehicle in the road.
All of us are puzzled, but not terrified since its in the afternoon, we took the incidence as a joke and moved forward as we have to cover lot more distance. By grace of god nothing happened to us during the whole tour
I also happened to have a similiar experience in case of my dad when i was 18, my dad was suffering from cancer and was in hospital since 2 months. Doctor has confirmed that my dad will easily make-up and can easily survive for 5-6 yr more, one a day before he passed away i had a dream of him giving me his bike key, he is very happy at the same moment, my dad never used to give me his bike to ride or touch and always say you will ride one when you earn one. On the morning when i woke up i was really puzzled seeing my dad giving his bike in dream, but after an hour i got the sad news from hospital about the tragic incident which happened last night.
. From that day my beleif on spirits increased to a great extent.
I also has got 2 more ghost seeing apperance, once when we were on roadtrip to Orissa and MP, and other experience happened when we were on our trip to Andaman islands.