A hydrogen and batteries driven aircraft was forced to land after a flight incident. According to the aircraft company the aircraft was forced to an emergency landing, but landed normally on its wheels in a flat grass field and almost came to a stop, but was damaged as it caught the left main gear and wing in the uneven terrain at the end of the field at low speed.According to the sources, the flight conformed to the approved test route over the airport, and that the aircraft structural integrity was maintained throughout the incident sequence.

According to the media news, the accident involved an explosion of a fuel cell driven forklift during driving, resulting in an employee's death and 6 light injured other employees. The fire did not spread. This has been confirmed by an OHSA investigation (see references), which however does not specific any cause and responsibility.

The boat was performing a drive test when one of the 280 lead gel batteries exploded and took fire. The local fire brigade was able to extinguish the fire but the above deck section of the boat was extensively damaged. According to Volger and to Wannemacher (see references), the automatic fire-alarm system of the hydrogen storage and the fuel cells were "brought in a safe state" and did not suffered any damage.

The boat was a 6.5 m semi-rigid electric-powered inflatable canoe, mainly used for greeting and directing pleasure boaters in harbour.It exploded without a flame shortly when an employee of the harbour master's office turned on the ignition after unplugging the batteries. The back of the boat was projected into the air, together with the employee, which was hospitalised. The boat was completely destroyed. Purchased three months before, this boat was one of the three pre-series prototype boats in service in marinas.

An explosion occurred at testing equipment of a fuel-feeding system for a space rocket engine. According to the original source of this event, now lost, the test envisaged a 42 MPa high-pressure hydrogen gas flow system, an exhaust gas duct outlet was damaged and hydrogen blew out and exploded. High-pressure hydrogen was flowing during the test, and burned not in the burner (a gas generator), but in a silencer tower after flowing through an exhaust gas duct.

A leak of hydrogen gas, followed by an explosion, occurred when an engine was loaded with air, oxygen, and hydrogen, and then started for a preliminary ramjet engine combustion test. The engine was ignited with a fuse head. The test facilities were destroyed,

A Worner 1000 STU gas balloon, of German registry D-OAGH, piloted by a commercial pilot was substantially damaged during landing, when the hydrogen-filled envelope came in contact with a power line, caught fire, and burned. Visual meteorological conditions prevailed at the time of the accident. The balloon was a participant in a racing event associated with the annual Albuquerque Balloon Festival and was being operated under the provisions of 14 CFR Part 91 without a flight plan. The pilot and copilot reported no injuries.

Hydrogen ignition during the (illegal) filling of a balloon.Two men had decided to fill in a weather balloon with hydrogen in a storeroom located in the basement of a block of flats. Their idea was to attach a video camera to the balloon for the purpose of taking aerial photos. To fill in the balloon, the men had purchased a 20 kg hydrogen bottle and a valve and constructed a special mouthpiece for the purpose. They had tried filling a similar balloon previously. Then, they did not experience any problems in filling the balloon and had left the balloon in the basement to let it empty.

The balloon had a 3.5m external diameter envelope made of anti-tear fabric (same techniques used in full sized balloons of the same company). The inner balloon was a meteorological balloon made of latex. When starting filling the inner balloon with hydrogen (final full balloon relative pressure of 0.03 bar) a leak was noticed, due to a small rupture in the skin of the latex balloon.The filling process was stopped but by this time some hydrogen had become trapped between the inner latex balloon and the outer fabric envelope.

An explosion occurs during testing of the hydrogen feeding of an engine in the Spatial Agency Centre.