I felt somebody was grabbing my legs in my bed-no kidding?

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i was sleeping in my room in my hostel and there has been no light and i was sleeping and my door was latched from inside untill midnight it was ok then i i don't know that i was out my bed and standing and then suddenly i was 2 feet up i moment then turned upside down then nxt moment i was in my bed and some force like having human hands grabbed my feets and held them tightly i was then scared to my death and then i suddenly statred chanting goddess kali name then that force released me and i woke up with my heart to my mouth and ran out and told my hostel mated may it was hallucination but the force was real which was holding my legs and after wards also i could feel that somebody was grabbing my legs-may be it was a ghost or just my nightmare -what do u think happened to me ???