Repair is the effort that speaker makes to smooth utterances or conversations in order to achieve the ongoing progressivity of the turn. Among the types of repair, self-repair is mostly preferred (Schegloff et al., 1977) in talk-in-interaction, and in self-repair, self-initiated self-repair is mostly preferred, especially when it happens in the same turn. Therefore it has received much attention. In the gate-keeping interviews for Chinese candidates to get access to the target college in Britain, there occurs in L2 a large number of same-turn self-initiated self-repair cases, in which the initiation is no longer the single lexical words, or the non-lexical pauses like cutoff , or sound stretches as has been studied, but the paralinguistic device, laughter. Despite the numerous studies on roles of laughter, there is hardly a mention of laughter employed as a self-repair initiation. Consequently, this study determines on the focus on laughter as a self-repair initiator in L2, and aims to identify its exact shape and positions in self-repair and relevant repairing segment, therefore concluding on its specific functions and its relations with delicacy. This study wishes to contribute to the researches on self-repair initiation in Conversation Analysis and on laughter in particular L2 testing context.