While audiences were left shocked (see below), Network Ten then showed Abbie walking out of the car toward Osher in a "prank" we weren't ready for.
"Abbie - you lift me with a smile. I've struggled with my emotions - and this is the hardest decision I've ever had to make. My heart belongs with someone else," Matt tells her. "It devastates me to leave someone so incredible and..."
After a moment of silence, Matt continues: "I've treasured every moment we've had, and you deserve everything..."
"Can you explain why?" Abbie asks.
Matt says, "There's nothing to explain other than my heart. There are feelings there, I've never said or felt anything that wasn't there."
"I don't know what to say," Abbie says. "It's absolutely heartbreaking. Absolutely heartbreaking."
See below for Twitter's best reactions to Abbie's elimination.
Now time for love! "You encapsulate everything I'm looking for in a woman," Matt tells Chelsie. "Coming into this experience I promised I would throw caution to the wind and overcome my fear. My heart is fluttering and it could get broken into a thousand pieces, I feel the time is right to take the plunge and tell you how I feel - Chelsie, I love you."
"What, I thought you were dumping me," Chelsie says, clearly shocked.
Matt continues, "It would be easy to say I love your passion for science, but there's more - I love how you giggle when you're nervous, I love that you go full nerd as soon as there's some maths involved, above all else I just love how you make me feel - because when I'm with you I feel like I'm living in one."
Matt then gifts Chelsie a ring as a "memory" of the trip.
Below, the best Twitter reactions.