People may be familiar with the "Kids react to..." videos, but those kids mostly seem like annoying spoiled brats to me. They also made two "Elderly react to..." videos which are funny. There's one where they react to dubstep and one where they react to Nyancat.
The videos are 7 to 8 minutes long each, so they're kinda lengthy, but there are some great moments in there. Here's three bits I cut out with a site called splicd:
Elderly singing dubstep:
http://splicd.com/WgII2gDY-Rw/206/220
Elderly dancing to dubstep:
http://splicd.com/WgII2gDY-Rw/300/337
Woman finding the meaning behind the term "viral" videos:
http://splicd.com/Dqm4dQv4F9w/218/230
Elders react to...
Re: Elders react to...
i bet none of these match up to the two-girls-one-cup reaction vids
some of those were priceless
some of those were priceless