Excitement

From Tardis Wiki, the free Doctor Who reference

Excitement was an emotion.

The Qetesh were a species that fed off excitement in people's lives, draining their life essence with it. (TVGoodbye, Sarah Jane Smith)

The naked Bella Slitheen let off an exceptionally long and loud fart without her gas exchange unit, which she attributed to being "really really" excited at the prospect of a human hunt. (AUDIO: Madquake)