Airlines are squeezing as many passengers as they can onto their jets, but one seat manufacturer believes its product can help carriers push capacity to the absolute limit. And it may help push down fares. Say goodbye to whatever personal space you had left. At this week’s Paris Air Show, lots of curious convention-goers eagerly wanted to try out Avio Interior’s “SkyRider” saddle-like airplane seat, but that’s probably not the reception it would get if people found it installed on their next flight. See it in the slideshow at the top of this post.