* was going to be a a difficult and dangerous one to quench. Nevertheless, Watts mind was set on it, and no possibility of being killed by Toronto police or vampire hunters wasn't going to deter him.
Course, getting on the bus was a bit of a challenge: after all, he was going to be searched before boarding by the driver. He obviously didn't get caught, I mean, it was daylight out and Watts was concealed enough to block the sun, but expose enough that no one would look at him and think 'vampire.' With that, he boarded, while smuggling the gun that he was going to use on the people or person responsible for Twist's death.
