Relief flooded Rizal, as strong as a tidal wave sweeping away all his doubts and fears. Professor Indri, though looking exhausted, stood before him, freed from the entanglement of the fourth-dimensional energy knot.
"Professor, are you alright?" Rizal asked, concern still lingering beneath his relief.
"Just a little tired, Rizal, but I'm okay," Professor Indri replied, his voice hoarse yet full of spirit. "You... you are truly remarkable! You used our knowledge of the three-dimensional world to manipulate this dimension!"
"I was just... following my intuition," said Rizal, still amazed by his success. "I felt our connection through that energy knot, and I knew... I knew I could use our knowledge to free you."
Professor Indri patted Rizal on the shoulder, his eyes shining with pride.
"You've done something extraordinary, Rizal. You've proven that human understanding of the universe isn't limited to three dimensions. We can study and manipulate a reality much broader than we ever imagined."
They both fell silent for a moment, admiring the beauty and strangeness of the fourth dimension surrounding them. Colors danced, geometric shapes rotated, and the non-linear flow of time created a cosmic spectacle that was difficult to put into words.
"But what about us, Professor?" Rizal asked, bringing their attention back to their current reality. "How do we get back to our world?"
Professor Indri's smile faded slightly, replaced by a serious expression.
"That's the million-dollar question, Rizal," he said. "We've opened the door to this dimension, but we haven't found a way to close it. And until we do, we're stuck here."
Disappointment crept into Rizal's heart, but he tried to remain optimistic.
"But we can surely find a way, right, Professor?" Rizal asked, hoping his mentor had a reassuring answer.
Professor Indri looked into Rizal's eyes, his gaze filled with confidence.
"Of course, Rizal," he said firmly. "We've come this far. We've proven that nothing is impossible. Now, we just need to find our way back."
And with renewed determination, the two scientists turned their attention once again to the vast possibilities of the fourth dimension, determined to uncover its greatest secret: the way home.