Dr. Smith ventured deeper into the scorching desert, clutching his water detector tightly. The relentless sun beat down, casting harsh shadows across the endless expanse of sand. But Dr. Smith pressed on, determined to unlock the desert's secrets despite the hostile environment.

As he delved further into the arid landscape, the ground beneath Dr. Smith's feet began to tremble. Suddenly, monstrous creatures erupted from the sand—sand worms, their gaping jaws snapping hungrily as they lunged towards him.

With lightning reflexes, Dr. Smith dodged the creatures' attacks, his heart pounding with adrenaline. But the sand worms were relentless, their razor-sharp teeth gnashing dangerously close. In the chaos, Dr. Smith lost his equipment, leaving him defenseless against the ferocious beasts.

With no time to spare, Dr. Smith sprinted across the desert sands, the hot breath of the sand worms close behind. Fear threatened to overwhelm him, but he clung to his water detector with unwavering determination—it was his only hope of survival in the unforgiving wilderness.
What does Dr. Smith lose during his encounter with the sand worms?

His water detector
His hat
His map