Grave situation man I met might have been a ghost

On one of our regular night-outs, my friends and I decided to dine at Comesum, Nizamuddin. It was past midnight when we were over with food and back on the road with our bikes, trying to outdo each other. After a while of speedy excursion, I decided to have some adventure. So, I proposed something I had been thinking of doing for a long time.

I asked all my friends to accompany me for a stroll into the Pandara Road cemetery. They were shocked and, as expected, refused to go there. All of them even tried to deter me from doing so but the idea of coming across a ghost - which I believed don't exist - was too fascinating to give up.

Going ahead with my preposterous plan, as my friends called it, in 10 minutes I was on that road facing the graveyard wall. The mere sight of the silent graveyard was tempting to attract me inside. A strange anticipation swept through me and I jumped over the low wall to enter the land of the dead.

As soon as I stepped inside, an eerie feeling took over me. It was dark and damp, but it had not rained the entire day! Nothing was visible except for the rays coming from one of the street lights.There was silence all around and not a single human being was in sight. Soon, it got spooky and scary and I wanted to move out of the premises. But something stopped me!
Suddenly I realised that I was standing in the middle of the graveyard without even having moved a step. As I shifted a little, I slipped and fell into a grave-like pit. I felt I was unconscious for a while as when I woke up I could feel that a little time had elapsed. Feeling damp mud on my cheek, I tried to stand up.As soon as I was standing again inside the ditch, I saw a figure of a man above. Looking down at me in a strange way, he offered his hand to pull me up. I could feel a chill run down my spine on holding on to his hand. It was colder than a normal person's hand would be in that weather.
After pulling me up, he asked me the reason for being in the graveyard at such a late hour. With a little hesitation, I lied saying I had come there in the evening to offer flowers at one of the graves but fell into the ditch, so was unable to leave. I then thanked him for pulling me out.
Taking the conversation a little further I got to know that he was a science graduate for the Banaras Hindu University. Then, I don't know why but the man asked me to check on my bike. Instantly, I was in front of the wall which I had climbed to come in. I could see the man waving at me and then disappearing into the darkness.When I was alone again, I realised that there was not a single peck of mud on either my cheek or clothes. I went to the graveyard next morning again to check out on that person. To my utter surprise, the keeper told me that no one was allowed inside after 11pm and the keeper was certainly not the one I met that night.
Was it the soul of one of the people resting in the graves there? The question haunts me.