Unabashed joy expressed itself on Leto's face when they shot up vertically - and then leveled out hard and fast at the sound of the alarms. It was all the young man could do to keep from outright laughing. This was the sort of stunt he would have pulled, were he in control.
"This is amazing," he said, staring out the window to each thing Wash pointed out. And then, when the subject of his eyes came up, he gave the pilot a quiet smile.
"Actually, no. My homeworld is permeated with a drug that heightens our senses and abilities. The best pilots use it to ensure hyper-accurate long distance space travel. One of its side effects is the staining you've noticed." He bypassed the rest of what the spice could do; not many people were comfortable with the idea of prescience -- not even on Arrakis.