Wendy jumped off the desk and punched him twice on the arm, hard.

He punched a button on the arm of his chair.

He punched a control on the arm of his seat.

Kirk punched a button on the arm of the seat.

Kirk punched the communicator on the arm of his chair.

Con punched him on the arm, climbed in and started the motor.

I punched him on the arm, but not too hard.

She made a low growling sound and punched him on the arm.

No one else had anything to say, so he moved down to his chair and punched the communication link on the arm.

She laughed, pulled her hand away, punched him lightly on the arm.