Director Jayson Thiessen (right) performed the voice of a very memorable background pony, fondly referred to as Snowflake by the fandom (http://www.youtube.com/watch?v=zzD2GrkGD0k). The guy on the left is perhaps Snowflake's biggest fan. Together, they did the "YEEEEAAAH!!!!" voice :-) Nightmare Nights 2013.