During this step, we're going to set the idle to jump start transition.
Return to the Arms State Machine graph and drag a wire from the Idle state to the JumpStart state.
Double-click the transition to edit it.
Control-click on IsFalling in the My Blueprint tab and drag into the graph to create a Get Is Falling node.
Connect the output Boolean pin from the Get Is Falling node to the input Boolean Can Enter Transition pin on the Result node.