The incident occurred in the 6300 block of Country Club Drive in Lucerne at around 5:30 p.m., and involved a 40-year-old victim, officials reported.
The man was up high in a tree trimming it when he fell out of it and onto a travel trailer about 25 feet below, according to Northshore Fire Chief Jim Robbins.
Firefighters responded with an ambulance and an engine, and reported that the man complained of numbness.
A REACH air ambulance landed at Lucerne Harbor Park just before 6 p.m. to transport the man to the hospital.
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