Laughter is what powers the four clownlike characters in Marta Carrasco’s 2005 work Ga-Ga, named after a fictional place; laughter is described as their oxygen, their food. But don’t expect a barrel-of-fun approach–Carrasco’s Mira’m, presented at the Goodman Latino Theatre Festival in 2003, was surreal and often violent. An eclectic score jerked the mood this way and that, and the performers’ doll-like masks distorted their humanity. Though that work was reminiscent of Pina Bausch’s dance theater, critics have insisted Ga-Gˆ is movement or circus theater. In any case, Carrasco’s fascination with imperfection rules out the usual technique-driven approach to dance. Compana Marta Carrasco, based in Barcelona, performs Ga-Ga; also this weekend Carrasco herself performs her 1995 solo, Aiguardent, for the last time ever. It’s described on the company’s Web site as “ruled by anger and innocence . . . [showing] the double life of a woman . . . who finds refuge in alcohol.” Though Carrasco’s work may sound difficult, her advice is to just let go: “Everything is simpler than it seems.” Ga-Ga Thu 8/17, 7:30 PM, and Fri 8/18, 8 PM. Aiguardent Sat 8/19, 8 PM, and Sun 8/20, 7:30 PM. $15-$25.