Yeah, I've had shaving gel too; that stuff foams up like something out of a sci-fi movie.
Let's be clear that there is only one place that this can go. The way that stuff foams up, he's not going to be able to resist throwing it at Kat... who won't be able to resist throwing it back. Then Pip will be caught in the crossfire... and the Squirrels... and the Denizens. The latter two groups will then weaponise the gel and the house might not survive!