Try using a touchscreen device and touching both sprites. I'm trying to see if it can be detected.
Try tapping both. Note they don't both say hello. Try tapping one first and then the other (while still tapping the first) note that the first one says hello but the second doesn't. Try lifting your finger off the first, notice how the second doesn't say hello. Note that if you move your second finger it still doesn't say hello.
