{They were troubled} (etarachth(8873)an). Much stronger than
that. They were literally "terrified" as they saw Jesus walking
on the sea. {An apparition} (phantasma), or "ghost," or
"spectre" from phantaz(935c) and that from phain(935c). They cried out
"from fear" (apo tou phobou) as any one would have done. "A
little touch of sailor superstition" (Bruce).