In a crowded emergency department waiting area, a 35-year-old visitor has been pacing for 20 minutes while waiting for news about a family member. The visitor now shouts at the triage nurse, clenches both fists, strikes the counter twice, and steps between the nurse and the only visible exit. The visitor drove the family member to the hospital 3 hours ago and has been in the department since. Speech is loud but clear and coherent, and gait is steady while pacing. The visitor is holding a half-finished bottle of regular cola from the vending machine; the skin is warm and dry. Other clients are seated nearby. The unit has a workplace-violence response code and a secondary exit behind the nurse. Complete the diagram by selecting the situation the nurse is most likely facing, 2 actions the nurse should take to address that situation, and 2 parameters the nurse should monitor in the visitor to assess whether the risk is decreasing.

Quick answer
Imminent physical aggression. Keep a clear path to the secondary exit and activate the workplace-violence response code. Monitor the visitor's Behavioral Activity Rating Scale score and verbal threats toward staff.

Why this is correct
Pacing alone suggests anxiety, but the visitor has moved from pacing to shouting, clenched fists, striking the counter, and blocking the exit. These are escalating pre-assault behaviors. Clear, coherent speech and a steady gait after driving to the hospital do not fit intoxication, and a regular cola with warm, dry skin does not fit hypoglycemia. Staff safety comes first: an escape route and a trained team response. An observer-rated agitation score and the presence of verbal threats show whether de-escalation is working.

Easy analogy or mental picture
When a kettle starts whistling, you step away from the spout and call for help to turn off the stove; you don't put your hand on the lid.

Memory hook
Fists + hitting objects + blocking the door = exit clear, code called; then watch agitation and threats.

NCLEX decision rule
When physical aggression is imminent, protect yourself and others first: keep an exit, call the trained team, then de-escalate from a safe distance while tracking observable behavior.

Why the other choices are wrong
A hand on the shoulder is meant to comfort but can be taken as a threat and invites assault. Surrounding the visitor with untrained staff looks like force and can escalate, so the trained response team should manage it. Juice with a glucose check and capillary glucose monitoring fit hypoglycemic agitation, and blood alcohol fits intoxication; the data make both unlikely. A self-rated anxiety score fits situational anxiety, depends on the visitor's cooperation, and does not track the risk of assault.