Excerpts from abc7chicago.com:

A tree trimmer was critically injured after a large tree branch fell on him Saturday afternoon knocking him unconscious and leaving him hanging in a large tree at about 3 p.m. in the 2700-block of Princeton Avenue in Evanston.

Fire officials said he was trapped more than 20 feet in the air. He was transported to an Evanston hospital in critical condition.

This from Tim Olk:

Skokie firefighters assisted Evanston firefighters rescue a tree service worker from a tree.

Evanston FD fire trucks

Tim Olk photo

Evanston FD fire trucks

Tim Olk photo

Evanston FD fire trucks

Tim Olk photo

Evanston FD fire trucks

Tim Olk photo

Evanston FD fire trucks

Tim Olk photo

Evanston FD fire trucks

Tim Olk photo