Kovari started the routine by making supposed holes in the lady's front and back with a 'drill'; this might have seemed too violent for the show, but they could have done the 'don't try this at home' business. Mulhern and Willoughby should have done this sort of thing much more often on the series
Also, notice the awkward moment and a laugh when Mulhern mistakingly mentioned its proper name "Passing Water" which I assume they must have pre-discussed substituting milk for as it was less likely to be associated with the bodily waste function. I totally agree, apart from this I believe they only performed a "Heads off illusion" together during the whole run on these live Saturday morning shows. Some great opportunities never realised for what would have been classic, fun, and treasured illusion performances. Especially for a show like this, aimed at kids with its cheeky nod to adults tuning in as well. Twenty years on, I don't think they'd even consider a kid's show like this anymore?