Nefesh b’Nefesh, the non-profit that seeks to increase the numbers of those who make aliyah, recently organized a holiday-themed “flash mob”—in which a group of people suddenly stage a seemingly impromptu, wacky performance in a public place—on Jerusalem’s Ben Yehuda Street. Do you want to watch over 100 people dancing to a version of Outkast’s “Hey Ya!” with Hanukkah-appropriate lyrics? Of course you do!