Is this an instacall for you? (WSOP ME big draw)

[Yuv]

I talked about this hand with gobbo and others, but I would like to hear some more responses. Maybe it's as straight forward as gobbo think.

Main event, late in day 3 (last level of the day). 2nd hand in a new table, that's about to break too. I raise KJhh in the co with 270k~ to start the hand. I think the blinds are 3k-6k/1k.

I raise to 18k, sb calls(50~ years old, but obviously no reads, 2nd hand at the table. Has me covered).

Flop 752hh. He checks, I bet 25k.

(Following the rest of the hand, I should have checked behind, but I didn't think his play was very likely)

He instantly says I'm all in.