Here we are, 8 in the morning, and BBC Breakfast has a caption up: Breaking News - Muhammad Ali dies. Can it be "breaking" news when it is an instantaneous event and not a developing situation? Even if it can, I heard that on the midnight news last night, so it's a bit old.
Not as catchy as "going off at a perpendicular". Although the tangent to a trajectory is (as you say) equivalent to Newton's first law of motion, in this case it may refer to right angles to the normal - "normal" being an old term for the perpendicular to a surface or line.
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