Alex Chadwick, a guitarist at the Chicago Music Exchange, has posted a video in which he plays 100 famous guitar riffs in one take on his Fender Stratocaster. Pretty much going in chronological order, he starts with Chet Atkins’ "Mr Sandman" and ends just over 12 minutes later with "Cruel" by St. Vincent. In between are such classics as "Johnny B. Goode," "Day Tripper," "Paranoid," "Layla," "Smoke on the Water" and "Walk This Way." The video has gotten more than a million hits.