Circa Survive guitarist Brendan Ekstrom walked offstage mid-set during a performance in St. Louis on July 21.

Ekstrom returned later in the set and finished without issue, but fans were still left confused as to what caused him to leave. 

Read more: Circa Survive announce new album, debut new song “Lustration”—listen

To answer these questions, Ekstrom took to Twitter to offer a full explanation of the night's events. Here's the transcript from a series of tweets:

“Quick note to those who were at the show last night. I've been doing this for 20 years and I've never walked of stage during a song before.  For almost a whole song I watched a guy stand a row behind a girl flirting and then trying to kiss her. It was hard to tell what was really happening. At times she seemed ok with his advances but after the second time of watching her push his face and hands away and try to turn back to watch the show I asked the security guard to go check on them. He couldn't see what I was pointing to and it was still happening I left the stage and walked straight for them, my mind an emotional blur. Security followed me.

“The man seemed dumbfounded when I showed up as if nothing was wrong. I don't know what happened after. I went back to stage to finish the show. Security took it from there. I didn't see them again after that. Maybe they were removed or just moved. Maybe they were in a relationship.  Maybe they weren't. Regardless what I saw from stage was disturbing to me and completely removed me from the mindset I need to be on stage.  It wasn't cute. It was alarming. I'm almost forty and flirting doesn't look like that. Maybe It's that I have a daughter or that I'm older.

“Maybe it's that I watched this video not long before we played and I couldn't shake it (video in tweet).  I Really don't know but it made me furious to watch a girl forcibly remove someone's hands from her body multiple times.  I still don't feel great about how I handled this situation. I borderline blacked out in some weird rage mode. it makes me nervous to think about how I would handle situations like this in the future especially if it was with someone I knew or cared about especially if it is my daughter. I don't really know what to say about it all. I'm sorry to my band for not communicating the situation better and leaving them standing on stage confused. And I'm sorry to fans who were equally confused and saw a bit of an unusual show.”

Circa Survive are currently on tour with AFI and Citizen. Their new album The Amulet drops September 22. 

Would you have done what Ekstrom did? Let us know in the comments!

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