If a bomb collides directly with a hero, first the hero jumps directly away from the bombs position (a jump of 1 is actually two spaces), then the explosion is centered on the space the hero occupied before jumping. In this case a wall. That wall, and any wall or player-placed tokens withing one space (including diagonally) are destroyed and any other heroes in that range also jump directly away from the center of the bomb as a Jump of 1.