Have namechanged.
On NYE I received a series of texts from an ex. They started off in rather a sarky tone, which I felt uncomfortable about, but then went on to say that he felt he was "owed" something (he actually referred to himself in the 3rd person which was bizarre). Then he started telling me he was listening to a heavy metal track which has the first 4 lines (I didn't have a clue - had to look it up):
"I'm rolling thunder pouring rain
I'm coming on like a hurricane
My lightning's flashing across the sky
You're only young but you're gonna die"
It's AC/DC and it continues along in this vein with references to hell, satan, etc. He carried on texting other similar song names to me although wouldn't answer any of my questions or engage in any kind of conversation. This went on until about 4am although at a certain point I turned my phone off and went to bed.
In terms of back story, we split up last summer at his instigation, although the ending was rather confused because he just disappeared on me, and we hadn't spoken since then. I had (stupidly) e-mailed him just before Christmas to say I hoped he was OK and wish him Happy Christmas etc. AFAIK he was not a heavy metal fan - he never seemed to be very interested in any particular genre of music.
Initially my reaction was just sort of "ignore & delete" but last night I could not get it off my mind. I had a bad dream and woke up terrified someone was in the house. He lives far enough away to be very unlikely to ever appear, but I don't know if I should consider this just as (possibly drunken) nastiness or something I should be concerned about.