Martin (1992: 313):
The same verbs [go and come] are similarly elaborated at group rank. The verbal group complexes involved specify types of coming and going with respect to leisure activities:go/come = swimming, skiing, snorkelling, jogging, running, sailing, handgliding [sic], surfing, drinking, etc.
The leisure activities listed do not 'specify types of coming and going'; for example, 'drinking' is not a type of 'coming and going'. Instead, the leisure activities represent the cause (purpose or result) of coming or going. The expansion relation is thus enhancement, not elaboration.