This gag was one of those that I originally thought up back in 1995... only it was Cassie in Matt's role and the little boy was left holding a tube of Krazy Glue.
TRANSCRIPTION COURTESY OF JOSEPH HOUK - [1650; Amsterdam, Holland, where MG and BG are continuing their tour of Europe] (BG, in appropriate period dress) "Rembrandt's place should be around here somewhere…" (MG, who sees a little boy standing against the dyke wall) "Hey look! There's a boy with is finger stuck in the wall!" (BG) "Whoa… So that story was real after all!" (MG, who has a revelation) "I know just the thing to relieve him of his duty… [he turns, and we hear the familiar off-screen FZZZT FZZZT; then he appears with a caulking gun hand] [speaking Dutch to the young boy] "I'll take care of this… Run along and go play with your friends!" [We see the hole in the dyke patched up – as a Dutch woman looks on – as MG walks away with BG] Now I need a place to put this caulking gun…" (BG, rolling her eyes) "I'm pretty sure that nobody here saw your caulk!"