Duck your heads!
Fig. 30: The zodiacs of the many safari boats are passing by over the heads of the divers and make awful noise. A wonder that there are any fish left here. — Nikon D200, Nikkor DX 10.5mm Fisheye, Elphinstone reef, Red Sea, 16 November 2011 Nikon D200; Δt=1/160 s; f=10.5 mm; f/6.3; ISO 200; 16 November 2011 06:53:29