Ive had bad run in's with smackrats in the last 5 years.
One time we caught one in my friends house when we came back from somewhere, we chased him up stairs then he jumped out of the bedroom window and ran off, we ran back downstairs and out of the house but the smackhead had gone:( It turns out the next day this guy was in hospital with broken legs or (something similar), which would have been when he jumped out the window. But the fact he ran off after jumping out of the window shows that they dont feel pain when high.
I have another good example which happened in blackpool but I cant talk about that on public forum.
These thieving scum get free needles too, So I wanna know wheres my free rizla?