We would look around at everything and it would all be very tiny. I think it would be kind of funny to look around at a bed and realize that only my foot could fit on something that another person slept on.
It would be even weirder if there were giants walking around us all the time. It would be weird to realize we could be squished on accident or on purpose at any given moment in time. I am glad that I don't have to worry about that problem every day. I would probably be much more scared to go outside.