It shows a sample of aspirin he made after being inspired by our recent video.
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Always glad to see people replicate our demonstrations - providing they know what they are doing and take all necessary safety precautions, of course!
We definitely wouldn't want to see anyone repeat any of our explosions without plenty of chemistry knowledge and safety equipment.
Chris made his aspirin in a research lab, by all accounts.
Here's the original video we made in which Dr John Moses made a sample of aspirin.