One time at LGA, there were 4, 15" MBPs going through the X-ray in a row. Mine was #3, and it got pulled for additional screening. When I asked why mine, they're all the same laptop and the guy just shrugged.
Leaving KEF a few weeks ago, my bags were pulled for a random check. But, at least the Icelandic security guy was nice enough to tell me as much...
"Your bag was selected at random for an inspection."
"Now, I'm going to carry it over to that table. Please follow me.
"Now, I'm going to unzip it."
"Now, I'm swabbing for residue."
Quick, professional, and not at all stressful. Unlike similar experiences at IAD and FCO.
