Elon Musk's son upstaged his dad's rocket re-entry during a zoom presentation, and the kid made something clear ...

X AE A-Xii -- government name -- was on the lap of his 50-year-old pops during a conference about Elon's reusable rockets -- a feat even NASA has not been able to duplicate.

The boy was happily babbling in a zoom box as the folks at the conference had a choice ...