The ornamental design for a basketballpopcornmachine, as shown and described.
FIG. 1 is a front, top and right-side-perspective view of a first embodiment of a basketball backboard popcorn machine;
FIG. 2 is a top-plan view thereof;
FIG. 3 is a left-side-elevational view thereof;
FIG. 4 is a front-elevational view thereof;
FIG. 5 is a right-side-elevational view thereof;
FIG. 6 is a rear-elevational view thereof; and,
FIG. 7 is a bottom-plan view thereof.
The broken lines shown in the drawings are shown for illustrative purposes only and form no part of the claimed design. In addition, the surface shading, if any, illustrated in the drawings is provided merely to highlight the contour of the design; it is not intended to be illustrative of texture or gloss.