MAPO Senior Open, Three Interesting Hands

I recently played in the Mid Atlantic Poker Open's $360 Senior Event (50+ y.o.) held at Maryland Live! Casino. Structure was decent with a starting stack of 30,000 and 30 minute blind levels. The following three hands seemed worthy of review. I'll present them in the order they occurred, and let discussion wind down on one before moving to the next.

Hand 1

Level 3 (200/300/300 BBA) 7-handed

UTG (~20,000) raises to 800

UTG+1/LJ (~35,000) calls 800

HJ (~30,000) 3bets to 2,200.

Hero/BTN (29,000) has JhJc. Action?