A spooky opening lick builds into an interesting heavier break, then opens up into a tense verse that continues to build up that tension really effectively until...
...WTF is this?! Somehow we've been transported into a terrible community college musical for the chorus! "Better watch out", indeed. And what's with the downtuned backing vocals? So terrible.
A few cackly "assassin!" calls and we find ourselves in a so-so solo that breaks into a couple of somewhat better ones.
Another round of verse, ending on a particularly bad vocal performance ("and you can kiss your ass goodbye!"), and then we're subjected to that chorus again before it's assassinated by a final cackle of "Assassin!"
This song angers me because the opening and the verse are killer (pun intended), and this great mood is built up, only to be unforgivably shit on by the chorus. Bruce's vocals are all over the place too, with some nice melodic singing at one moment and ridiculous cackling at the next. What a missed opportunity.
There's some good stuff here, but the negatives are so strong that they completely cancel out the positives. 5/10.