The audience at a Baltimore performance of the musical Fiddler on the Roof feared that a mass shooting was about to break out when someone began shouting Nazi salutes.

The Baltimore Sun reported Thursday that that a man burst out with “Heil Hitler! Heil Trump,” prompting the audience to “start running.”

“I’ll be honest, I was waiting to hear a gunshot. I thought, ‘Here we go,'” Richard Scherr said.

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Several moments later the man who shouted was escorted from the building, but Scherr said he spent the rest of the play with his heart racing.

“I didn’t even really pay attention to the second act,” he said.

The musical is a story of a Jewish family that is being persecuted in Tsarist Russia. It opened Tuesday and runs through Sunday at the Hippodrome Theatre.

The incident happened just a few weeks following the mass shooting at a Pittsburgh synagogue where 11 people died. Reports of anti-Jewish incidents in Maryland increased 47 percent in 2017, The Sun reported.

Watch the video below:

Sick, sad world. A man stands at intermission of tonight’s performance of Fiddler in Baltimore and yells, “Heil Hitler,” along with pro-Trump references. pic.twitter.com/slDcPwF7re — Rich Scherr (@writerguyRich) November 15, 2018