Emmerdale S38 E170 Episode 5378 (Thu 20th Aug 2009) (Part 1)

Aaron agrees to accompany Paddy to the Bartons keen to see Holly who he still has a crush on. However, after being teased about his crush and laughed at by Andy and John when he attempts to tame a sheep, he's furious and storms off. Sulking in the barn, he starts to light stands of hay and watching them go up in flames.