Rapid Reaction with Picric acid
Taken from news://sci.chem in response to a question on chemical accidents
A Chemist was doing a base-catalyzed reaction on a system including picric acid. The solvent was methylene chloride. The volume of the solution was only around 50-100 mL or so, and it was in an Erlenmyer flask. When he added the triethylamine, there was a WOOOOSH like a dry powder fire extinguisher going off. To this day there is an 8-foot diameter yellow circle on the ceiling. Lucky he was standing a bit to the side when it went off.