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/ Source: TODAY
By Scott Stump

Did this toddler's shopping cart just hit 88 miles per hour?

A dad shopping at Costco with his young son may have proved that "Back to the Future" wasn't just a movie after all.

Is that the toddler's older self in the background?A_OBCD8663 / reddit

The father posted a picture on Reddit of his little boy dressed in the exact same lime green polo and plaid shorts as a much older man in the background.

"I guess I know what my son will look like in 70 years..." the dad wrote about his little boy's look-alike. (Woman's Day was among the first to flag the funny photo.)

Perhaps old Biff Tannen zipped back from the future to slip young Biff a Grays Sports Almanac when his dad was not looking?

He's just waiting patiently on a bench for his opportunity.

If the older man is in fact the boy's future self, they should avoid meeting, or else it could create a time paradox, the results of which could cause a chain reaction that would unravel the very fabric of the space time continuum, and destroy the entire universe!!

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So there's that.

Reddit commenters had other theories.

"Your son just wanted to see his father one more time before he died, so he took a Delorean Uber back to 2016," one wrote.

Another added, "All universes cross at Costco."

Follow TODAY.com writer Scott Stump on Twitter.