Actually neither. Not at all uncommon in Alaska, although the ones in the vid were probably on the more extreme side. Super Cubs are your friend. Lots of vids on youtube. http://www.youtube.com/watch?NR=1&v=21El16OPZoc&feature=fvwp
I've been enjoying exploration of this site - BackCountry Pilot. http://www.backcountrypilot.org/forum/index.php Enjoyed the videos you posted jcurry.