On his back in the street, face up, feet barely touching the pavement, the young man had a permanent look of wide-eyed terror in his clean shaven features. Were it not for the high cheekbones, he would almost seem baby faced. Exposed intestines, visible through the shreds of a football jersey, ruled out the suspected drunk driver who had had kissed a telephone pole moments after adding insult to the poor boy's considerable injury.
If this is a crime or horror (or similar) I'd definitely read on because I want to know what happened to the young man.
Some phrases I struggled with - "kissed a telephone pole" - at first I took this literally, had to read it again to get that you meant he'd crashed the car into a telephone pole and also hit and/or run over the young man, but because his intestines are visible, it wasn't the car that killed him. For me, this line needs to be clearer. However the situation itself makes me want to read on to find what happened. The POV isn't totally clear - is this narrated by an omniscient narrator or a detective/forensic scientist arriving on the crime scene? I kind of want to know that as well. Some info, like the genre/type of story would be evident from the cover/blurb, so in a bookshop I'd know that.
I think that this could use some rephrasing to make it easier to picture on the first read. Starting with "on his back in the street..." without knowing who or what until later in the sentence, isn't so easy to picture. You might want to be more direct and graphic in the third line rather than "adding insult to" - did the car run him over after whatever else happened to him? Also, maybe take more than 3 lines to describe what's going on. The 3 lines thing of the game is quite arbitrary, and I think the permanent look of wide-eyed terror on a corpse is enough of a hook for someone to read on and get to the full details of the boy's demise in line 4 or 5. Having said that, I just realised you didn't say that the boy had actually died. I kind of assumed it. I took the permanence of his expression being rigor mortis. Little details like that need to be very clear.
Hope that makes sense as I'm quite tired... in any case I think the situation you're opening with is a strong thing to open with and would make me read on.