It was first period inside Gieszinger's chemistry class and a bizarre chain of events is about to take off. Students say the teacher came into class with a pair of scissors declaring it was hair cut day.
"We think she's going to try to be funny and be like 'Oh did you really think I was going to cut his hair?' But she did cut a hair off, and she started singing the Star Spangled Banner and she was singing it really loudly as she ceremoniously tossed a chunk of hair behind her," said a student who wanted to remain anonymous.
The student says he was sitting in the back of the classroom and ran to the main office for help.
"I hope I never have to see her at the school again, because I know for a fact I can never see her as a respectable authority figure in my life."
The video continues to show Gieszinger grabbing at another girl's hair before everyone makes a run for it out of the classroom. Students claim they don't know what triggered her behavior but say she had a similar breakdown earlier this week.
"I know that on Monday she had another freak out because a test was missing or something. She accused the students of taking the test."
College of the Sequoias Police have since arrested Gieszinger on suspicion of corporal injury to a child. Her bail is set at $100,000.