Straight down the line.

Straight down the line.

It's straight down the line, isn't it?

Play it straight. They're not kiddin'.

It's got to be perfect, understand. Straight down the line.

Nice little camera. Focal plane shutter, rapid rectilinear and all that.

But it's straight down the line now for both of us.

Trying to zigzag it to make sure that all of the apartments look at the straight views, instead of into each other.

If you look first at the behavior of the fly on the right, you can see that whenever it reaches the midpoint of the chamber where the two odors meet, it marches straight through, as it did before.