Moms have super vision

This morning I almost missed the bus to work because I'd left my bike at lab yesterday (when one rides so much that one almost forgets how to walk, one also tends to forget to get up earlier to catch the bus). I sat next to a bespectacled young woman with a blonde pixie haircut and two little boys, for whom the ride was clearly not routine.

As we went up the hospital loop, the younger one asked "What's that?"
"That's the Waisman Center," his mother told him.
"There's a lot of ambulances."
"How did you spot them? They're all behind the building."
"I have X-ray vision."

Not to be outdone, his older brother proclaimed, "I have reading vision."
"Mama, I have reading vision and X-ray vision AND laser vision!"

The mother looked at me as I began to break down giggling and sighed, "You guys are good. I only have reading vision. What do you use your laser vision for?"
"I use it for all kinds of creepy things," said the little one.
"So it's a weapon then?"
"Yep."

They went on in this vein for several more minutes. I got off at my stop and, still snickering, left the bookworm and her two little supermen, but what I really wanted to tell her was, "You don't just have reading vision. Mamas have super vision."