A dramatic video has emerged of a tree falling onto an amateur lumberjack in a residential area of Hamilton, Canada.

The footage, shot by a neighbour on August 10, captures the moment the tree slides down, hitting the man holding a chainsaw with its branches - as the filmer can be heard predicting.

Paramedics were called after a massive 100 foot tree fell on this smart guy's head," the filmer told Newsflare.

"These supposed tree removal guys had no idea how to properly cut down a tree and almost got killed doing it," he added.