His earnings are 'directly proportional' to the number of units he sells.
The second game followed 'directly' [='immediately'] after the first.
Their house is 'directly' ahead. = It's 'directly' in front of us.
(..) - Thank you. We run industrial-strength electrical cable from the top of the clock tower... Meanwhile, we've outfitted the time vehicle with this big pole and hook... ...which runs directly into the flux capacitor. At the calculated moment... ...you start off from down the street... (..)1985 Back to the Future