I don't get it

My friend sent this to me without context and is refusing to elaborate

I hope it's not what I understand

Explain the joke

IVE BEEN SEEING THIS IMAGE EVERYWHERE WHATS THE CONTEXT

I’m don’t get what people are laughing about

I guess it’s something about “Roasting Reddit”

What am I missing about the last one?

What does John Travolta have to do with Nicolas Cage??

Show me your IDs

i don’t get it

Help