Almost at the same time a pistol-shot , flash and report , came from the hedge side .<br>And that was plainly the last signal of danger , for the buccaneers turned at once and ran , separating in every direction , one seaward along the cove , one slant across the hill , and so on , so that in half a minute not a sign of them remained but Pew .
Flash and report came at almost the same time as a slowly-moving snail.
The statement is indeed definitely incorrect, because the text states that "Almost at the same time a pistol-shot, flash and report, came from the hedge side". This basically exhibits a face-paced scene; I turned this around and gave the statement that flash and report came about the same time as a slowly-moving snail, which would be nowhere near the speed of a pistol-shot. I think the system found this difficult because the initial text is a bit ambiguous in itself. 
( z1 come :ARG1 ( z2 and :op ( z3 flash ) :op ( z4 report ) ) :time ( z5 time :ARG1-of ( z6 same :ARG2 ( z7 snail :ARG1-of ( z8 move :ARG1-of ( z9 slow ) ) ) :mod ( z10 almost ) ) ) )