I have lived at the edge of our retention pond for 30 years & I have seen a great many fish jump out of the water but always at an angle less than 90 degrees. Every time like something was after them & they were trying to escape. While hand feeding the ponds CNBG, I saw my first one go vertical. Perhaps 8" & he went up absolutely perpendicular to the water for at least 36" before losing momentum & falling back into the water. Why ? I don't know, but I was impressed!