Even during the trough era, peak times were hard to navigate. You might not have enough room to even square up at the trough. Turn sideways, wedge an elbow in there, and point your stream perpendickular to the guy in front of you. You might even need the guy next you to hold it for you. I've seen guys 2 feet back of the trough arc one in through the crook of another man's elbow when there wasn't enough room for the old hookshot. It was just understood.