Back to the Future Part II theory: 2015 Biff PLOT HOLE finally solved?

After Doc, Marty and Jennifer take off in the flying DeLorean and disappear into the future, Biff saw it all.

Which is why he recognises the same time machine 30 years later in 2015, admitting he hadn’t seen one in three decades.

Reddit user Biff_Xannen wrote: “In Back to the Future, Biff sees the DeLorean vanishing.

“Then in Back to the Future Part II, elder Biff calls the DeLorean out by name when he sees it again.”