I went to an outdoor performance of the 1812 Overture last night. At the finale, a sequence of 'cannon fire' occurred.
In past years the smoke has had the expected sulfur odor but this year the dense cloud of white smoke that drifted over the crowd had no (to my nose) detectable odor at all. In all other ways the detonations were normal- extremely loud, jet of flame, dense white smoke. Any ideas about what explosives were used?