A substitute teacher in Florida was so angry with a principal that she smeared human feces around a Sarasota park pavilion that the principal had rented for her childs birthday party, law officers said.

Heather Carpenter, 42, faces a single count of criminal mischief over $1,000, according to the Sarasota County Sheriffs Office. She was released after posting a $2,500 cash bond.

Authorities said they became aware of the incident on Dec. 1, when a witness reported seeing a woman, wearing blue gloves and a mask, placing human waste and fecal matter on the porous wooden tables and grills at Urfer Family Park in Sarasota.

Mike Hutchinson, who said he was at the park at the time, told Fox 13 News he was shocked and appalled when he walked into the pavilion and saw what had happened.

The smell hit me, and I noticed that she did it to every table, Hutchinson said. It was a mixture of urine and feces, and she had it in a big cup and was just pouring it out and wiping it in.