tibbius says:
@Anirtak would be our third and would like to join us in about a week.
Crudely, I envision the character completing a bio break in a corner of the basement and sprinting to catch up with the two of you, miraculously avoiding any dangers you've conquered or avoided in the meantime.
How does this sound to you?
BY THE WAY: there is a way to do "experience points" with Tunnel Goons derivatives that I like quite well. It is that you level up every 10 points, and you get 1 point for each FAILED roll. I think each of you has failed a roll (regarding the intricate carvings in that first room), so each of you gets a point.
In my real life games, when a player has to miss a session, we always gave the character dysentery, so I support this.