What is the test for giving jury instructions in a personal injury case?

"A party has a right to jury instructions on his or her theory of the case, if they are reasonable and supported by the pleadings and the evidence, or any inference which may properly be drawn from the evidence. [Citations.] This right is designed to ensure the jury has 'a full and complete understanding of the law applicable to the facts' of the case before it. [Citations.]" (Sesler v. Ghumman (1990) 219 Cal.App.3d 218, 223.)

"'Instructions should state rules of law in general terms and should not be calculated to amount to an argument to the jury in the guise of a statement of law. [Citations.] Moreover, it is error to give, and proper to refuse, instructions that unduly overemphasize issues, theories or defenses either by repetition or singling them out or making them unduly prominent although the instruction may be a legal proposition. [Citations.]' [Citation.]" (Major v. Western Home Ins. Co. (2009) 169 Cal.App.4th 1197, 1217.)