`DavidG's Dizzy Movie:`

r(t) = [x(t), y(t)], t = 0 .. 6.29, `time steps` = 350

x(t) = PIECEWISE([0, (25-24*tan(t)^2)/(1-tan(t)^2) <= 0],[(25-24*tan(t)^2)/(1-tan(t)^2), 0 < (25-24*tan(t)^2)/(1-tan(t)^2)])^.5*cos(t)

y(t) = PIECEWISE([0, (25-24*tan(t)^2)/(1-tan(t)^2) <= 0],[(25-24*tan(t)^2)/(1-tan(t)^2), 0 < (25-24*tan(t)^2)/(1-tan(t)^2)])^.5*sin(t)



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