Flooding involves one long session where the patient experiences their phobia as it's worst while at the same time practising relaxation. The session will continue untill the patient is fully relaxed in the pressence of their phobia. This cantake place in person (vivo) or in virtual relatity. Priror to the flooding, patient learn relaxation technique before being exposed for 2-3 hours. Adrenaline has a time limit and decreases overtime. This mean a new stimulus - response link can be learned between the feared stimulus and relaxation.