渗
=
参
+
氵
:
Sherlock Holmes (sh) is horrified (渗) to find that he accidentally emptied his water bottle (氵) over his bib number (参) in the encampment's bathroom ((e)n4), and now he'll have to run the race with a seeping (渗) bib number on his body.
碳
=
炭
+
石
:
Tecumseh (t) further processes the charcoal (炭) he made in the anthill's bathroom (an4) into pure carbon (碳) by crushing the charcoal (炭) into its elements and exerting extreme pressure with a rock (石).