“I got to jump off cliffs and ride horses, and that terrifies me,” Stewart said Saturday during a WonderCon panel for the film. “I was really, really not happy about having to do all that [horseback riding]. I don’t like that – I hate that.” The actress has been wary of horses – “I hate ‘em,” said the star, who suffered a riding injury as a child. “I fell off a horse once and hurt myself really…