I have too many favourite Westwood moments:
There was one they used to have on the Radio One site's archives, where he interviewed Russel Brand about heroin addiction, and after hearing Brand say he spent a lot of time looking out of windows and crying when in rehab, Westwood shouts 'DOG! YOU HAD <i>ISSUES!</i>'. He also got a crack is wack reference in there.
There was the time he asked Lil Jon whether he liked dark or white chocolate best, and the anti-smoking skit he did. 'This is Westwood! Smoking's a bad look; your breath stinks, and YOU'RE GONNA DIE!' The recent one with Griminal and Little NASTY was amazing, when they were trying not to swear and Westwood said that it didn't feel like a studio to them (including himself), it felt like they were spitting bars on a street corner. The time Riko and Wiley kicked off over Westwood mentioning Lethal B was another good one.