The Beginning: Zigil-Dûm Market - Gunderson & Thrazar

The party wanders around, getting separated from each other. Thrazar ends up losing track of Darann, being distracted by various inns and taverns he comes across along the way.
Gunderson hasn't noticed Darann and Erlanger due to being stuck behind Thrazar, and ends up following the barbarian.

Thrazar looks around, assessing the area. Somehow, the group got separated, but the ale coursing through his veins helps to calm him. He turns to Gunderson.

Well, we know whatever happened here, the culprit skeetered out the front gate. Let's find out what we can find out.

Thrazar scans the market in search of any merchants who were affected by the disturbance.

It doesn't take long before Thrazar notices nearly all merchants got affected. Nearly all merchants are busy turning their carts and stalls back upright and collecting their wares off the ground. Various goods are shattered from the fall, others seem to have been squashed and smeared out. Here and there, you can see some visitors try and grab something amidst the confusion. The guards are keeping an eye out for them, and those petty thieves seem to be getting caught rather quickly.

Thrazar looks around and with his voice raised and hands cupped around his mouth, speaks to anyone who might listen.

Anyone mind telling me what happened?

Thrazar's voice booms over the ruckus from the market, crisp and clear to everyone within earshot. Just as loud, a voice whose owner can't be distinguished from within the crowd, yells back:

"GIANT WORM! YA BLIND YA DIDN'T SEE IT!"

Gunderson approaches the nearest merchant who does not appear to be repairing his stall (if there is one. The post said "nearly all")

Hello, good sir. We were chatting with King Brightshield in the throne room, when a guard brought us the news that a creature caused a disruption here. The king sent us to find and deal with whatever creature caused this disturbance. What can you tell us about this worm?

Gunderson leans in to shopkeep and lowers his voice.

Was the worm made of meat, or metal?

"I can't believe I'm asking this," Gunderson thinks to himself. But it is the current leading theory... He leans back in to whisper conspiratorially.

You didn't happen to see an orc nearby that may have been controlling the worm, did you?