Is it normal people dream this

OK so a few nights ago I had a dream it began pretty nice I was walking down an empty railroad holding my girlfriends hand and we was flirting and having a good time. So we was walking on a part of the railroad that went over another part like a bridge we looked down to the lower road and saw 3 lights like in a row. All of a sudden I was alone in a dark school and three guys two black one white was running away and I chased em all down and kept saying give it back.... I killed em all one by one saying give it back is this normal?