Cause of a stinging breakup?

Usage examples of teargas.

The pouring smoke and teargas, pops and bangs from simulators and blanks and the natural disorientation on top of psychoacoustic blasts was all the score we needed.

I heard somebody say the cops teargassed the tunnels under Fifty-ninth Street and the Park.

I found Hagbard in Grant Park, cool as usual, with a bucket of water and a pile of handkerchiefs for the teargas victims.