Yellow statues, designed to make people think about how they use Accident and Emergency services, have begun a tour across north London.
The figures each represent a different injury or illness - and are displayed alongside information on the best NHS services for treating that problem.
Doctors say many people wait for hours in A&E when they could have got quicker treatment closer to home.
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Six people were injured after they were hit with the substance during an "altercation" between two groups at a shopping in east London.
Save Your Uber in London was set up after it was announced the firm would not have its licence renewed when it expires next week.
Survivors are still traumatised, homeless and want answers.