Just read this in the Sun.
A 44 year old woman in India was rushed to hospital after ingesting Poison. The doctors decided to pump her stomach and as they were treating her, whatever was in her stomach mixed with what was used, ignited and there was an explosion in her mouth. Some reports are also saying her whole head exploded.
There is CCTV footage but it's not very clear.
https://www.thesun.co.uk/news/909256...d-ignited-gas/