Combining a knack for infectious melodies with a quirky, bizarre sense of humor and a vaguely avantgarde aesthetic borrowed from the New York post-punk underground, They Might Be Giants became one of the most unlikely alternative success stories of the late ’80s and early ’90s. Musically, the duo of John Flansburgh and John Linnell borrowed from everywhere, but their freewheeling eclecticism was enhanced by their arcane, geeky sense of humor