It comes out of nowhere.
You're walking down Thayer Street and an alien jumps out to scare you.
For those who welcome the experience, afterwards there are photos, belly rubs and lots of laughs.
"Scare people, dance with people, interact with people, just having some fun," said Jason Lichtenberger of Ripfilms Studios.
But the Ripfilms Studios crew, who went viral on the Internet with their scary snowman act, has also had a few run-ins with the law.
The Ripflims crew said 99 percent of the police officers who approach them are OK with what they're doing once they have a chat.
But the pair told NBC 10 on Wednesday, on two separate occasions, the same Providence police officer told the pranksters they had to leave or they would be arrested.
"And we were doing our thing at East Side Pockets and an officer came along and had asked us to leave," Lichtenberger said.
After a confrontation with the officer, the pranksters ended up doing what they were told.
"We didn't want to leave, but we didn't want to get arrested. And we felt our rights were trampled on," Lichtenberger said.
"And we got permission and he still came, and it's like he was looking for us. I feel like he's targeting us," said Brian Mederios, of Ripfilm Studios.
The pranksters say they're not looking to sue. They just want their rights upheld.
"I just want him to leave us alone," Medeiros said.
"I would just simply like to be left alone. Told it's OK to move forward, we're not going to be bothered anymore, this officer made a mistake, and just want to go about my business," Lichtenberger said.
Calls placed to the Providence Police Department have not been returned.