I'll try to explain it more, in case someone didn't realize.
In short
#MOMO is trending
because.
#AppleEvent is for, Apple event (where Apple announces new products, etc.).
It was event on September,10.
So
and #MOMO trending, above #AppleEvent
Then Jack Phan (I think he was joking whole time anyway) actually clicked links
and got
So he assumed/"assumed" that it is some Korean content, so probably Samsung.
And he got lots of reactions, for example: