If a builder enters you, then you know he will have a good erection.
 If a mechanice enters you, then you know he will have a good tool.
 If an electrician enters you, then you know sparks will fly.
 If a plumber enters you, then you know it will be a good fit.
  
 but.........
  
 If a terrorist enters you.............then you know you will explode ! 
   
 Shakes