Excuse me, your supporting layer is showing

TO had a recent air travel experience. Most of this passed as per usual, but for a curious twist. On a couple of occasions, the seatback video system was restarted. TO observed and laughed at the appearance of a Linux penguin on the upper left corner of each seat's screen, with a boot sequence scrolling below it. TO's seatmate commented that TO was perhaps the flight's only passenger to find the occurrence of such a display amusing, even though it had presumably not been presented to the captive audience with this intent. Perhaps so.