Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: It is usually Arsenal that are sending opposition defenders into a spin with their intricate pass and move football, but they were given a taste of their own medicine on Wednesday. Mikel Arteta and Theo Walcott took a break from training in the torrential rain at the club's London Colney headquarters to take part in the dizzy penalty challenge craze that is sweeping the internet -even manager Arsene Wenger and mascot Gunnersaurus get involved. There was a sombre mood at Arsenal after they fired another blank at the Emirates during a goalless draw with Liverpool on Monday night, but the squad had that giddy feeling back despite the miserable weather in Hertfordshire.Mikel Arteta and Theo Walcott took part in the dizzy penalty challengeDespite their giddiness both managed to score their respective spot kicksArsenal mascot Gunnersaurus also took a turn but miss-hot his penaltyManager Arsene Wenger found the whole thing hilarious 
 Question:'This is _ and this is his dizzy penalty,' the Arsenal boss says.

Gunnersaurus