Around 60 people gathered in a small theatre at a shopping centre to watch an array of scientific experiments, including a "small hydrogen explosion."Several children suffered second degree burns with children aged between five and 13 rushed to the nearest hospital.It remains unclear which chemicals were used in the experiments, with some reports claiming both hydrogen and alcohol-based chemicals were used.However a statement released by the Russian investigative committee examining the case said the science show had used "liquid nitrogen".The "flammable" substance was then ignited by the gas

Hydrogen leaked from an analyser and ignited .On-site staff isolate the leak. As the leak was very quickly isolated, the amount of hydrogen released was negligible. Event no. 35501 of the French database ARIA (accessed December 2020) https://www.aria.developpement-durable.gouv.fr/accident/35501/

A chemical mobile intervention unit intervened in the faculty to neutralize in an envelope sealed an experimental device likely to release hydrogen. The faculty was evacuated during the intervention.

An explosion occurred on a tank truck whilst unloading hydrogen into a storage tank. The explosion occurred near the discharge valve of the truck injuring two people and starting a fire at the point where the hydrogen was leaking from the damaged valve.The fire was too big for the fire brigade to keep it under control. The fire could be extinguish only by approaching the site and manually closing another valve. Both the stationary tank and the tank on the truck were not affected by the fire.

During the start-up of a propylene hydrogenation reactor, very high temperatures were generated in the catalyst bed. At the time, propylene and hydrogen were being fed to the reactor which contained a granular catalyst. The temperature rose rapidly, and the hydrogen supply valve tripped at 176 degrees C.

An incident occurred on a compressor at a refinery Fluid Catalytic Cracker Unit (FCCU) plant involving hydrogen. Source of ignition was hot surface.

Discharge pressure of a hydrogen compressor on a chloride plant fell to alarm level without any prior warning and simultaneously three bumps were heard.Smoke was seen coming from the hot motor bearing and the machine had to be stopped locally as it had not tripped.

A road tanker was being loaded with liquid hydrogen from a 15,000 gallon storage tank, when fire broke out after 1 inch rupture disk failed, ignition source was a loose connection in down stream piping. The ignition was not immediate after rupture.

A high pressure reactor ruptured during a catalyst activation operation. A gaseous stream of hydrogen and light hydrocarbons was released and spontaneously ignited. The unit was immediately shutdown and depressurized. The fire was limited to the vicinity of the ruptured reactor and was extinguished within twenty minutes by onsite emergency services.

The soldiers of the Royal Prussian Air Ship Division stored large amounts of hydrogen gas. They kept some 1000 cylinders in a shed. On 25 May 1894 about 400 of them burst without apparent reason. Damage was considerable.