after Vadim was rescured in Beantown Brewery, when he speak his final dialogue line with player - "These idiots had caps and chems just lying around...", interrupting dialogue (by simply walking away from him, for example) will result in giving player award for quest, but the next final stage of the quest ("Talk to Travis"

will not trigger. This procedure may done many times, and every time player will recieve award (200 caps, 2 jet, 4 buffout).