Like any great satire, This is Spinal Tap dances carefully between truth and parody, so those who haven’t viewed the 1984 documentary—or, if you will, rockumentary—for a long time may have forgotten just how good Spinal Tap, the band, actually is. The primal intensity of “Hell Hole” still sends shivers along my spine, and I often catch myself mimicking the thunderous Smallsian bass line of “Big Bottom” and recalling that song’s catchy lyrics: “My baby fits me like a flesh tuxedo/I’m gonna sink her with my pink torpedo…/Big bottom drives me out of my mind/How can I leave this behind?” Tap into America at 5 p.m. at the Library of Congress’ Pickford Theater, James Madison Building, 1st & Independence Ave. SE. FREE. For reservations call (202) 707-5677. (David Plotz)