We claim the ornamental design for a percussion musical instrument, as shown and described.
FIG. 1 is a front view of the percussion musical instrument.
FIG. 2 is a right side view of the percussion musical instrument.
FIG. 3 is a left side view of the percussion musical instrument.
FIG. 4 is a rear view of the percussion musical instrument.
FIG. 5 is a top view of the percussion musical instrument.
FIG. 6 is a bottom view of the percussion musical instrument.
FIG. 7 is a right front perspective view of the percussion musical instrument; and,
FIG. 8 is a left front perspective view of the percussion musical instrument.
In FIGS. 1-8, the broken lines immediately adjacent the shaded surfaces represent boundaries of the claimed design and form no part of the claim; all other broken lines showing portions of the percussion musical instrument depict environment and form no part thereof.