Sorry for e 'accidentally'

I was on China Eastern plane on Fri midnight about 11.55am. The plane was still on Singapore runway and was about to take off.
I was sitting at window seat alone and I happened to look out of the window.
I saw something weird. I saw someone walking at the runway. He was rather swaying from left to right. His dressing was weird, like wat u would see in cartoon. I looked to him 'walking' n he looked up to me after he realised tat I was looking at him.
I ws shocked at how come someone would walk at the runway at the midnight of the night. I turned to look at other direction n turned back, thinking tat my eyes are playing tricks at me, 'he' was gone!
I was lying down at the other seat beside me as I was trying to sleep. I kept waking up in e midnight of e night as I could feel tat someone is playing with my hair quite roughly. It kept me waking up two to three times.
I thought it might be someone who is walking to toilet who accidentally touched my hair but e touch is quite rough.
When I told e story to baby n my friends, they told me tat I met with something dirty. 'He' might be e one who played with my hair. They said tat luckily I met with a kind thing tat is playing with me n didnt follow me.
I only accidentally 'see' him. Sorry for e accidentally.