To be trapped in a burning aircraft is every airman's nightmare. In small jets, the cockpit rarely has side windows that could serve as emergency exits and if the crew survive the crash they have to go aft to escape. Example - the ditching of the Westwind.
Many years ago the United States Air Force (USAF) lost several F80 Shooting Star fighters that over-ran on landing or on high speed aborts. In those days ejection seats were not zero speed - ground level devices, and if the aircraft canopy was warped or jammed the pilots could not escape. The USAF introduced canopy breaker tools, rather like a heavy solid knife, that was installed in the cockpit and which could break through the thick glass of jet canopies.
Following the USAF experience the RAAF installed the same canopy breaker tool in certain types including the Sabre, CT4, and Macchi jet trainer.
The first life was saved soon after when a Sabre ingested birds after lift off and forced landed into a rice paddy field. It caught fire and the pilot was unable to open the canopy more than one inch. He un-clipped the knife from its installation next to the canopy, and hacked his way through the canopy to safety. Visit the RAAF Museum at Point Cook and you can still see the canopy breaker knives installed in the CT4 and Macchi.
The RAAF still have canopy breaker knives in some of their aircraft. If an ounce of prevention is better than cure (smoke detectors in houses for example) - then operators of small jets (or any light aircraft where a jammed canopy may prevent escape from fire), would be well advised to fit a canopy breaker tool in the cockpit to give crew a fighting chance of escaping a fire should the canopy jam or has no exit capability in an over-run such as the Citation at Milne Bay.