It seems like it would be easier for some people to rig a boiler to explode than trying to get their hands on dynamite.

Why go through the hassle of trying to source a bomb when the victim provides you one on location already.

FYI, I'm not saying that's what happened, just that your dismissal shouldn't be immediate.

Also, the best way to sabotage something, is to make it look like an accident, that way they aren't looking for you.

Well... then I guess the local boilermakers' union will have to come around with Scabby the Rat inflatables.

Are you familiar with the concept of a joke ? I can send you some peer reviewed papers to read about humour if you'd like.