Witnesses in the Orlando shooting massacre said they thought the initial gunshots were just "part of the music" playing in the club.

Luis Burbano sat with CNN and described the moment that he and his friends heard gunfire ring out inside Pulse, a gay nightclub in Orlando. Burbano, like many witnesses, said he thought the sounds of gunfire was just part of the show.

As a DJ, we do hit a lot of "sound effects"—and to be honest I've never understood how a realistic gunshot at high decibel levels would make any sense in a crowd of people. After this tragedy, I don't think many DJs will be using that sound effect at all.

I know I won't be using

At the time of this post, an investigation is still ongoing in the shooting that killed at least 50 and wounded many others.