this chimp, frodo, was particularly violent and nearly killed her one day. >> goodall: he flipping well up, and dragged me down, stamped on me. it hurt. he bashed my head onto a rock, and it was bleeding. and then, he... then, he went away, and i thought, "oh, well, i've survived." and then, he came back and did it again. and then, he pushed me over the edge. and if there hadn't been some little bushes growing there, i wouldn't be here now, because it was a way big drop. >> logan: this is frodo's older brother, freud. although he looks menacing, bill wallauer, who filmed these pictures, says it's just a show meant to intimidate. >> bill wallauer: that's somebody. >> logan: it's a chimp? >> wallauer: yeah. >> logan: where? >> wallauer: just through the veg there, in the tree. >> logan: bill came here to work for the jane goodall institute, and lived in the forest for 15 years. >> wallauer: wow, look at those eyes. >> logan: the institute carries on jane's work here through bill, a team of researchers, and scientists who come from all over the world. >> wallauer: don't you get the feeling