Since this has turned into a discussion about the word several, I believe it's more than 3, because theres already words for 2, "couple" and 3, "few". And just because it kind of sounds like 7, I think the max number of things to refer to with "several" is 7. Therefore, 3-7 in my eyes.
Oh yeah, and the harlem shake is one of those things you can find hilarious or annoying. I don't have much of an opinion on it.