Another stretch I know of is someone who is a US-citizen but did not want to give out their laptop password. So they try to wait him out at the airport for as long as they can - 8 hours I believe. No water (I mean who knows maybe you can build a bomb from water) no ability to stand up or walk (you might run). Sit in one spot for 8 hours. After which he still didn't want to give out the password and they had to let him in because he is USC and 8 hours ran out. So guess what they did - they packed him in a car and drove him to another airport (!!!) and told him the 8-hour clock resets (first amendment supposedly does not apply to airports on any ports of entry). After 2 hours the officer smiled and told him they can do it endlessly, because they will just come back to the previous airport. My friend gladly gave up password and was let go 45 minutes later.
Edit: no, my friend has not been anywhere with this. I asked him about this, he said that he is afraid of going anywhere since he had whole laptop hard drive with music that he cannot prove (anymore??) he has bought it, so it might be assumed illegal downloads. Its been almost 2 years. I think he moved on.