I love watching Rob Brydon doing his impressions, particularly on The Trip when doing Michael Caine or Mick Jagger with Coogan. Plus it gives me a chance to show my wife my impression of Rob Brydon doing Mick Jagger doing Rob Brydon doing Michael Caine in Zulu. "Ere, Rob! Rob!! Don't throw...
I think the funniest thing I've seen him do is read his "The Tiger who Came for a Pint" book out on 8 out of 10 Cats. I was in pain laughing. So inventive too.