Kicking off the debut of their "Mansion Sessions" today, Pitchfork.tv provided viewers with a stunning performance by motorcycle enthusiasts Twin Shadow. The Brooklyn group performs an energetic version of "Five Seconds" for the site's latest web series performance that, as you might expect, showcases bands playing in an abandoned Bushwick mansion. No word yet as to how often we can expect material from the new series, but if this is any indication, we can expect some promising live sessions. [P4K]