While scouting ahead of the group down a long smooth, round tunnel, Aridha feels something that brings her up short; something that doesn't belong. A gentle breeze that caresses her hair and face for a moment. The earth quivers slightly, and another puff of wind follows...this one warmer and smelling faintly of brimstone.
Only then does Aridha realize how this tunnel must have been made.
"Ratheros! RUN!"
The elf and tiger alike whirl about and bolt back the way they came, even as another rumbling is felt, and the wind becomes steady, foul-smelling, and ever hotter. Far up the tunnel a reddish glow becomes visible.
The rest of the group, taking a break at one of the many places where cracks, crevices and intersections present a 'crossroads' of sorts deep in the Underdark, and waiting for Aridha as they do, hear the elf's voice echoing from out of the tunnel she'd gone exploring into...
"Everyone get back across the chasm! GET BACK ACROSS!"
There's no arguing with the tone of the command, and the group starts to cross back over the rope bridge Morgrim had risked so much to get into place. As they do, foul-smelling smoke starts to belch from the tunnel.
Abruptly Aridha and her tiger burst from the mouth of the tunnel, sprinting madly even as the stone around them starts to color red. Aridha's armor and hair are smoldering, and the soles of her boots hiss each time they touch the rock. From behind them as they dash for the rope bridge explodes a fast-coursing tongue of lava. Though it slows a bit as it spreads out across the flatter ground near where the chasm splits the cavern, it's still far too fast to outrun. Aridha makes a final desperate leap and dives straight into the rope bridge with enough force to actually snap the tie, letting her swing across the chasm and hit the far side hard. Ratheros makes the leap as well, grabbing onto the only thing he can...Aridha herself.
The two dangle there from the rope, watching lava pour over the far side of the gulf and vanish into the darkness below. Ratheros...forced to dig his claws into Aridha to keep from falling...makes an apologetic growl and licks her hair as the party hauls the two up.
Exhausted, bloodied and smoldering, Aridha rests for a moment at the top and says in her usual deadpan style,
"We'll go a different way."
(and thus ends the Fail.
)