What was the deal with Serano at the end of G1?

As many times as I've rewatched this series, I still don't understand that part. To me, I always assumed when he pressed the door handle, his car was going to blow up or something. So maybe he was assassinated. Or perhaps, it's up to our imagination, and because of this it's purposely meant to be confusing to the viewer. It's kind of a "WTF" moment.

You can always try looking to see if there is an explanation on wikipedia. I haven't read the spoilers on there for quite a while, so I can't actually remember if there was an explanation for that part.

Margeary is dreaming of horses.

Rise and rise again-until lambs become lions.

I think the clear implication is that the car exploded when Serano pulled the doorhandle. There is also an audible explosion sound effect after the scene cuts away, if you'll notice.

Here are my thoughts on Serano's assassination:

If you'll recall, the guy who is walking away in the parking garage is mumbling to himself, as if talking to Serano, about the need for moral flexibility. Serano testified in order to clear his conscience, in the same way as Imakarusu who was assassinated previously. If someone were willing to kill Imakarusu for doing the same thing, that person would be willing to kill Serano, who possessed the same knowledge Imakarusu did. These circumstances indicate that there was still an active conspiracy, and that the Serano was killed to prevent him from revealing the full depth of that conspiracy.

As far as who opened the door, I don't really think it mattered who opened the door, because Serano would still have been in close enough proximity to car to be killed in the explosion. Whoever opened the door would've been doing so for the purpose of Serano climbing in, after all.