“Big Bang Theory” actress Mayim Bialik went on a Twitter rant after she wasn’t allowed to board her connecting United Airlines flight from Houston to Los Angeles on Sunday, Feb. 11. However, her meltdown “isn’t surprising” to people who know the star, according to a new report.

The renewed “Big Bang Theory” fame has turned Bialik—who plays Amy Farrah Fowler on the CBS sitcom—into a “mini monster,” an insider source told RadarOnline.com. The source went on to explain, “especially when she travels. She’s super intelligent, but she’s also an entitled diva.”

On the other hand, Bialik insisted she wasn’t a “prima donna.”

“To the @UnitedAirlines flight attendant who shut the boarding gate in my face. I made my connecting flight in Houston,” she tweeted about the incident at the George Bush Intercontinental Airport in Houston. “it was a tight squeeze but You said there were plenty of open seats. when you saw my carry on suitcase you said there was no room and shut the door in my face.”

To the @UnitedAirlines flight attendant who shut the boarding gate in my face. I made my connecting flight in Houston. it was a tight squeeze but You said there were plenty of open seats. when you saw my carry on suitcase you said there was no room and shut the door in my face.

— Mayim Bialik (@missmayim) February 11, 2019

Bialik was left in shock and feeling furious, questioning why she couldn’t somehow fit her suitcase in one of the alleged empty seats on board.

“And also why couldn’t my little suitcase somehow fit?” she wrote on Twitter. “Maybe the first class seat I was supposed to sit in could have held it and I would have gladly sat in all of the open seats anywhere on that plane.”

And also why couldn’t my little suitcase somehow fit? Maybe the first class seat I was supposed to sit in could have held it and I would have gladly sat in all of the open seats anywhere on that plane. 🙁

— Mayim Bialik (@missmayim) February 11, 2019

Bialik explained how she “aggressively” ran through the airport and barely made it to the gate for her connecting flight before being turned away. When the agent told her that her carry-on wouldn’t fit on board, Bialik tried explaining that she had a first-class ticket and that her bag could be stashed there.

“Random people think I’m a prima donna because as she shut the door I said ‘I have a first class seat!’ I didn’t mean I deserve it more, I meant can my suitcase sit in my first class seat and I’ll sit anywhere else?” Bialik wrote.

“And there were five other people from my flight standing there with me who she let on the plane,” Bialik continued. “They all had carry-on luggage too.”

And there were five other people from my flight standing there with me who she let on the plane. Maybe she just doesn’t like The Big Bang Theory. They all had carry-on luggage too.

— Mayim Bialik (@missmayim) February 11, 2019

Bialik also took to Instagram to vent her frustrations, elaborating on the alleged incident. She again put forth her theories as to why she was turned away from the gate.

“Maybe she hates the Big Bang Theory. Maybe she was having a bad day. Maybe she hates women who look like they’re going to cry,” Bialik wrote on Instagram.

Ok @united airlines. i know I barely made my connecting flight. But I made it despite your delays making me late. And you turned me away as you let 5 other people on from my connecting flight because I had a carry on suitcase. They had carry ons too. I understand everything was shut but that lady stewardess didn’t have to shut the boarding door like she did in my face without even saying she was sorry. Or with 7 min left she could have made a small effort to try harder since she said there were “plenty of seats open.” Maybe she hates the Big Bang theory. Maybe she was having a bad day. Maybe she hates women who look like they’re going to cry. Now my suitcase is broken from running so hard and aggressively, my asthma is super angry and random people think I’m a prima donna because as she shut the door I said “I have a first class seat!” I didn’t mean I deserve it more, I meant can my suitcase sit in my first class seat and I’ll sit anywhere else? Not a good day for me and @united .

A post shared by mayim bialik (@missmayim) on Feb 10, 2019 at 4:34pm PST

“Now my suitcase is broken from running so hard and aggressively, my asthma is super angry,” she added. “Not a good day for me and @united.”