R2D2?

A few mornings ago we were having family prayers before sending Bret off to work.  It was my turn to pray and as I was praying Bret received a text.  His text alert sound is a soft whistle.  Well, the whistle sounded and I hear Aiden give a quick intake of breath.  I'm not sure what it's about so I keep praying.  Then Aiden says, "What?"  There's a pause, but I, being used to my kids not being so reverent during prayers, keep praying still.  Then Aiden pipes up again, "Did you hear R2D2?"

I busted up laughing.  I'd never thought about it but I guess the whistling sound does sound like R2D2.