Injured ISM Agitator was Berkeley Tree Sitter

Turns out that ISM freakzoid who got whacked in the head by the IDF with a tear gas canister was one of those tree-sitting wackos at the University of California.

An American activist critically wounded by an Israeli gas canister in the West Bank is "hanging from a thread" after brain surgery Saturday, friends said.

Tristan Anderson, 38, a "tree-sitter" from Oakland, Calif., was hit in the forehead when troops shot tear gas during a protest of the separation barrier between Israel and the West Bank village of Naalin.

Anderson was in the intensive care unit of a Tel Aviv hospital yesterday, with girlfriend Gabrielle Silverman keeping a bedside vigil.

"He's really touch and go. He's hanging from a thread," friend Paul Larudee told the San Francisco Chronicle.

Anderson and Silverman, 25, were arrested last year after spending 21 months in a "tree-sitting" protest at the University of California-Berkeley, fighting against the administration's plan to rip down an on-campus grove.