The bulging of the eyes out is known as being bug eyed
It represents someone having seen something that is extraordinary that causes their eyes to pop out.
Bug-eyed refers to looking at a person’s loved one also.
Something amazing or superlative positive makes people bug eyed. It used to refer to being frightened too but is now only used to reflect amazement.
Example
>I was bug eyed looking at her wedding dress and jewelry.
>The way he scored all those runs for his team, the match made everyone watching it bug eyed.