It (1990)

Revealing mistake: In the library scene when Richie sees Pennywise the clown, all the balloons filled with blood are popping on people who aren't supposed to be able to see them, but one lands on a lady and you can see her jump as the balloon pops.

Pennywise: I'm every nightmare you've ever had. I'm your worst dream come true. I'm everything you ever were afraid of.

Trivia: Tim Curry admitted that while he enjoyed working on the film, he was ultimately disappointed by the finished product, mainly due to the ending. He felt the final creature (a massive spider) was poorly executed and a massive let-down, and lacked any sense of fear or suspense.

Question: Tim Curry is said to appear as two different characters, Pennywise and Richie's boss, but I couldn't see him as the second. Where does he appear?