On 20 May 1967, Stefan Michalak reported encountering a landed object near Falcon Lake, Manitoba and suffered burns. The RCMP and the Canadian Department of National Defence investigated.

Falcon Lake matters because it is a Canadian physical-trace case with official RCMP and DND records.
Documented
Michalak reported a landed object and burns
Documented
The RCMP and the Canadian DND investigated
Debated
The object identity
Debated
The cause of the reported burns
Unverified
Extraterrestrial origin
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Documented source.
Documented source.
Secondary / debated material.