Hello, Mark. If you're sick, then why do I have so many photos of you up and about? Let's put your so-called "illness" to the test. Right now there's a slow-acting poison in your veines. The antodote is inside the safe. The combination to the safe is written on the wall. Hurry up and program it in, but watch your step. By the way, that's a flammable substance smeared on your body, so I would be careful with that candle if I were you. Or all the people that you've burned with your act just might have their revenge.
字幕では「君の放火で死んだ人々に復讐されるかもしれん。」 となっていますが、burn with にはスラングで侮辱するといった意味があるので、「おまえの行動に侮辱された全ての人たちが、復讐するかもしれない」つまり、マークは放火などしていないのでは? という指摘があります。つまり、字幕は間違っているのではないか?
They are using "burned" with a double meaning in that part. I haven't seen the movie, but a slang term to use in America is that someone got "burned" by someone else. It means that something negative was done against them, or they were rejected.
For example, an arrogant guy asks a girl out on a date. Not only does she reject his offer, but tells him that he's arrogant. His friends would tell him that he got "burned."
In the movie, he did horrible things to people, or, as they put it "burned" them. So they are going to take the slang term and give it a literal meaning, by setting him on fire. Does this make sense?