Snapshot of the vertical xz-plane from movie mv07, frame 14. Top row: Vertical cuts of PGs 7b and 7a in temperature T, magnetic field strength B, magnetic inclination γ, and vertical velocity component v_z. Solid white or black lines correspond to τ_500nm = 1, and green or magenta lines correspond to contours of plasma β = 1 and 5. Upward-directed vertical velocities are positive (blue). The origin of the horizontal distance, x, is at the spot centre. Bottom row: Corresponding horizontal slices in normalised intensity, magnetic inclination, and vertical velocity at τ_500nm = 1. Contours correspond to I_out = 0.75 I_ph, and a horizontal line marks the position of the xz cut. Ten movies of 11 PGs are available online.