advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware care careful caution communicating communication concern danger dangerous directions font informing Look looking lookout observant parallel-signage rectangle red reflective risk risks safety sign signage signs slow slow-down speed speed-hump steel-post traffic traffic-sign triangle warning warning-sign watch watch-out white word angry animal animals defense Hystricidae India karnataka krayker Mangalore Pilikula Porcupine quill rodent ruffled sharp spines alligator beneath cayman croc crocodile fear fresh gator reptile salt saltwater submerged sveres teeth underneath underwater water cable cables current distribution electric electrical high voltage instalation line lines overhead pole power sky wire wires barbed wire barbs barrier double fence fencing gray grey metal restraint silvery spirals strands twists construction equipment construction vehicle Dirt equipment equipment hydraulics heavy duty hydraulics machine machinery mobility movement strength avoid copy copyspace disaster distress face hand hands hide man men people sad sadness space appearance flag Flags jolly-roger pirate-flag pirates skull-and-crossed-bones symbol symbolic traditional beach breakers breaking breaking of wave north sea ocean sea shore storm stormy surf surge wave