When did Breaking Bad jump the shark for you?

Obviously it jumped from day one. As there is no way this could ever be taken seriously.
But I was able to suspend my disbelief until the end of season 2. Then we had the two planes colliding, due to events that lead back to Walter. That did it for me. I just couldn't take it seriously after that. No what they did, Gustav Fring, the Nazi biker gang(!), it all just seemed over the top.
Alright for a show where they dissolve a body in acid...and get away with it, despite melting half the house two, I get that it was never about realism. But it just got more and more ridiculous. Tell eventually it ran out of steam with Walter turning his car into a remote control death machine. As Mr T might have said "I pity the fool who write that"