The ornamental design for a handgripbridge, as shown and described.
FIG. 1 is a top perspective view of a hand grip bridge showing my new design, wherein the partial view of the hand shown in broken lines illustrates environment only and forms no part of the claimed design;
FIG. 2 is a top view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a left side view thereof.
The broken lines illustrate environment that forms no part of the claimed design.