The great thing about physical reality is that there's plenty to observe. What kind of plant do you think that is? This place is cool have you been here before? Check out that crazy looking drink on the menu! Your shoes are cool, where are they from?
Talking about the weather is also a classic for a reason! Point out the temperature, we're all experiencing it. I love when there's a slight breeze like this. You can also reference something you know about the person and ask for more detail. Take a deep breath and share the moment together :)
