Funny Little Thing

I am currently watching 怒火街头2 (Ghetto Justice II).  I know I'm so outdated now only watch this drama.  I got no time previously working more than 12 hours per day, I only manage to watch now because I'm now unemployed.

I found one funny thing from the drama.

The hair in the first picture is much longer than the hair in the second picture!  But the accident happened first (in first picture) and then only appear in the hospital (in second picture).  Funny right?  How he can go cut his hair in that few minutes?!  ldm.

ps: what do you think fml and ldm mean?