A Canadian woman narrowly avoided getting hit by several chunks of ice that crashed through her bedroom ceiling Thursday, likely dropped from a passing airplane, officials said.

The Calgary, Alberta fire department said the woman was in her room and only a few steps away when debris “exploded” through her roof shortly before 9:30 a.m..

Fire crews found several chunks of ice about 6 inches long on the bed, along with pieces of shingles, plywood, drywall and insulation.

Fire department spokesman Jeff Budai said his best guess is that the “frozen liquid” fell from a passing airplane.

The Transportation Safety Board of Canada is looking into the incident and confirms that a couple of airplanes were in the area at the time.