NIGHTMARE!?

This morning, I saw nightmare...
All my teachers and old lab mates show up to my dream...
One of them, my closest friend was beside me, and other people were following us.
My friend... I dun remember what exactly he said.
But I remember he was asking me to go to LAB.
I was happy to see them... but going to my lab... is nightmare...
And my old lab mates... they are not in our lab any more.
Already graduated... (T-T)