Jack Be Nimble is ready for his big jump over eight candlesticks! However, it doesn't go according to plan. Will Jack be able to jump again? Plus: Special guest Ricky Gervais explains the word stumble"-with a little help from Grover. Ernie is up to mischief, singing a Wake Up" song to his sleepy pal Bert, and Abby has an enchanted session of show and tell in Flying Fairy School. Finally, get up and jump with Elmo's World! This is brought to you by the letter J and the number 8.