Date: 202101
Local time of day: 1201-1800
Location: PWT.Airport, WA
Flight conditions: VMC
Weather elements / visibility: 10
Light: Daylight
Aircraft: Small Aircraft; High Wing; 1 Eng; Fixed Gear
Operator: FBO
Operating under: Part 91
Flight plan: None
Mission: Training
Flight phase: Landing
Airspace: Class G ZSE
ATC / advisory: UNICOM PWT
Second aircraft: Small Aircraft; High Wing; 1 Eng; Fixed Gear
Reporter organization: Personal
Reporter function: Instructor; Pilot Not Flying
Reporter qualification: Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Human factors: Communication Breakdown
Anomaly: Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Runway
Detector: Person Flight Crew
When detected: In-flight
Result: General None Reported / Taken
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: I was conducting a training flight with a student and entered the pattern at PWT on the 45 for a full stop landing on Runway 20; making all radio calls in the pattern. As I was on short final (100 ft. AGL); the aircraft holding short makes a radio call that he is 'taking the active [Runway] 20'. He did not move his aircraft and continued holding short as I crossed the threshold; at which point I assumed he saw me as I passed right in front of his windshield in my roundout. I could not make any radio calls within those few seconds due to other traffic making calls in the pattern. As I am completing my landing roll to exit on taxiway A3; I hear a plane takeoff right on top of me. I asked on CTAF if he took off while I was still on the runway; to which 3 different aircraft concurred that he did. After a few minutes; as I'm departing the airspace; the aircraft in the pattern (along with myself) were discussing the events that transpired over radio. At that point; the pilot in question keyed up saying 'I'm still on frequency guys; what's the problem?'. I told him that he took off while I was still on the runway; to which he replied 'yeah; what's the problem with that?'. Another pilot noted that immediately after lift-off; he executed a steep right turn and exited the airspace at low level. In my professional opinion; the actions of the PIC of Aircraft X is a textbook example of a reckless operation; and a clear demonstration of several different hazardous attitudes. He obviously showed no remorse for his actions; believing that they were considered 'normal' things to do. There was absolutely nothing I could have done to prevent this from happening; because it is clearly all happening from the other guy's end. If I had to execute a go-around; it would almost definitely have resulted in a midair collision. The only way to prevent something like this from happening again is remedial training for this guy; or even a reevaluation of his certificate; because the way he operates his aircraft is clearly without regard for anyone's safety.




Synopsis: Flight Instructor reported that during the landing rollout another aircraft took off from the same runway and flew directly over them. While the flight instructor was discussing the event over the radio with other aircraft in the traffic pattern; the departing aircraft asked 'what the problem was' with his departure.