Other mistake: In the English dub of the series, Tai's last name is Kamiya; however, when he makes reference to the family name plate his father put on the front door in this episode, the name displayed is Yagami. (00:03:00)
Other mistake: The DigiDestined refer to Arukenimon by name before she formally introduces herself. Before her introduction, it is not established that the strange woman is in fact a Digimon.
Other mistake: When Veemon, Armadimon and Hawkmon are about to rush in and save Gatomon, a previous frame of Hawkmon's beak stays on-screen. (00:16:15)
Answer: He was in pain from the black gear that was stuck inside of his body.