A chemist and his friend walk into a bar
The chemist say "I'll have a glass of H2O please"
The barman hands him a glass of water and he drinks it and he's fine
The chemist's friend says "I'll have a glass of H2O too please"
He drank it and died
The chemist say "I'll have a glass of H2O please"
The barman hands him a glass of water and he drinks it and he's fine
The chemist's friend says "I'll have a glass of H2O too please"
He drank it and died