Yes, he's like that all the time -- or at least, the high-pitched comedian Goldthwait has been doing standup since he was still in high school in Syracuse, N.Y., in the late '70s. He starred in several Police Academy films, not to mention Shakes the Clown (which he wrote and directed). He even opened for Nirvana, of all things, on what would be the Seattle band's final North American tour. Now, he stops for a local performance at the Arlington Drafthouse. Friday, Jan. 14, at 7:30 p.m. and Saturday, Jan. 15, at 7:30 and 9:55 p.m. Arlington Cinema N' Drafthouse, 2903 Columbia Pike, Arlington. Tickets are $23. Call 703-486-2345 or visit arlingtondrafthouse.com.