So did you know you can take Photos with your voice too.
Many of you already know this , but this is for those who didn't know.
So what you've to do is open your Camera
Go to the Camera settings you'll the settings gear icon on the top
Now scroll down until you see this option
Shooting Methods
Open this
And you'll find Voice Commands options.
Turn it on and enjoy taking photos hands free.
This feature is maybe available in device specific let me know in comments if your device supported this or not.
Yes and I only take pics like this, I love it... also you can take by showing the palm of your hand 
