Read the book.
Big never wanted to go out to LA. He knew it was dangerous. Puff was the one that forced him to go on some ra-ra sh*t, egging him on. After Big got out there, that's when he started feeling Cali (good weather, weed, women, etc., etc.). It's hard not to like Cali after you get there. Big had gotten into an accident a little while before. He was liking LA but, he didn't want to go the Vibe party because the leg was still bothering him. Puff forced him to go on some "I brought you out here to promote" sh*t. After Big got killed that night, Puff was on the first plane out of California

Big's body wasn't even cold yet and this negro was on the Red Eye back to New York
That's b*tchmade man, I'm sorry. You knew it was dangerous to send your artist out there. You forced him to go anyway. And after sh*t got real, you run back to New York before everyone else