-Hit Meryl and retreat into your box. She will say something and kick you while in the box.
-Enter your box when you know an enemy is coming without letting him see you do this or move while in the box. Some guards say, "Ah, Mr. Box" and will leave. Others will say, "Ah, Mr. Box" and will sit there for awhile before yelling "Get out of the way!" and kicking the box off of you.