Point-to-point nebular diagnostic diagram for the different types of profiles described in the text. The points for the single profiles are colored according to the distance to R136 shown by the scale on the right. The solid curve shows the low-velocity shock models of Dopita & Sutherland (1996) for a range of velocities between 150 km s⁻¹ and 500 km s⁻¹; two values of the magnetic field density (0 and 1 μG cm⁻³); and solar abundances. The dashed curve shows the same models scaled to the metallicity of 30 Dor from Pellegrini et al. (2011).