Jenni 'JWoww' Farley Was 'Dumbfounded' by Angelina Pivarnick's 'Jersey Shore' Return: 'I Went Off' (Exclusive)

Although Jenni "JWoww" Farley, Nicole "Snooki" Polizzi and Deena Cortese don't have their first encounter with Angelina until next week, Jenni told TooFab she was completely "blindsided" by the whole thing and that she ended up going off on her -- in true JWoww fashion.

"Oh, my God -- I was dumbfounded!" Jenni said about getting back from New Jersey to find Angelina sitting at her dining room table in Miami. "I was spending time with my kids, it was a nice 48 hours, I go back, I'm like super excited, super refreshed -- and then she's like right there. It took a while to digest. It was literally like a car crash scene where the whole camera jerks. Like, that was my point of view when I stepped in the house and saw her there."

"I'm dying to see how I reacted, because again, it was one of those situations where I was so blindsided," she added. "I have no idea how bad I went off, but I'm pretty sure it was epic."

Jenni's encounter with Angelina was so epic, in fact, that she wound up losing her voice.

At the mere mention of Mike's reaction to seeing Angelina when he opened the door, Jenni burst out into laughter.

"No, like even to this day, he still talks about how shocked he was. Poor thing!" she said. "I mean, listen, I don't know how they played out my reaction, but I was just as shocked. His was priceless."

Although Mike had the most tumultuous relationship with Angelina out of everybody at the Shore House, Jenni said she wasn't surprised at all by his calm and respectful demeanor once he and Angelina got to talking. Since the show's original run, Mike has sobered up and cleaned up his act.

"I'm obsessed with the new Mike," Jenni said. "I assume and will always expect that's forever gonna be his reaction since he's in such a good place, where he just takes it in at face value. And he was probably waiting for the girls to go psychotic."

Jenni said the "old Mike" would have probably "slammed the door in [Angelina's] face, flipped out and made a big stink in front of and behind the scenes to production."

Jenni admitted she, too, would have at one time complained to production about Angelina's presence, but said nothing like that happened this time around.

"At the end of the day, we know there are certain things that create good shows," Jenni explained. "And she was part of it from the beginning. I would feel pretty beat up if I saw the success of my roommates after choosing to leave two times, but getting that unbelievable third chance -- I would take it, too."

"Jersey Shore: Family Vacation" airs Thursdays at 8 p.m. on MTV.