IF you were part of the near-capacity crowd wallowing in the action, atmosphere and booze at the Rugby Sevens last week, then no doubt you are familiar with the battle fans endured to seek relief from nature's numerous calls. Toilets at the stadium had queues of up to seven or eight people per cubicle. Not wanting to miss the action, a Keeping Posted sidekick finally succumbed to the unbearable urge and dashed off to the toilet. Groaning and with thighs tightly clamped together, our spy had whinged to a fan in the next queue who was equally desperate. Knowing the key to his relief would be getting rid of everyone else, the grimacing fan screamed out in his Australian accent: ''Oi! There's a lady streaking across the field!'' Our reliable spy couldn't help but be among the scramble to try to get a glimpse of the fictional streaker.