Pull-ups

Isabel and Alexandra looked around in the gym to see if there was anything that came to mind that they would do first. Deep inside the weightlifting room, they spotted a free pull-up bar that they could use.

"Let's do that!" Isabel said Alexandra as they both walked towards it.

Meanwhile, two other girls entered the gym, and people sighed when they spotted who they were. Their names were Claire and Carrie, and they just went by the common nickname "CC".

CC were known to cause a lot of noise in the gym, and they weren't really welcome there. But that didn't stop them from coming anyways, as they only barged in and never bothered to listen to the passive woman in the front desk trying to say "you're not welcome here..." with her low and fragile voice.

They both entered the gym just a few moments after Isabel and Alexandra had gone to the pull-up bar.

"Helloooooo peeps!" the two girls yelled out, and everyone's attention turned to them as the silence was awkwardly loud. People knew that they probably couldn't be doing their workouts in peace.

What happens next?