fluffy Probably, although knowing when and where one is coming with enough warning to get to one (without being in the right place at the right time) would be a pretty neat trick.
fedex well, the last words shouted there are something to the effect of "here comes another one!"
Scrotum H. Vainglorious I always thought these things were imperceptible out at sea and traveled near the speed of sound.
charmlessman Well, when they're as big as that one was...
Also, the boat may have been relatively close to shore. If they were above the continental shelf, it would be more noticeable.