Found a pH overflow.

code/modules/reagents/chemistry/holder.dm

@@ -129,6 +129,7 @@
 	if(total_volume > 0)
 		var/part = amount / total_volume
 		for(var/reagent in cached_reagents)
+			pH = 7
 			var/datum/reagent/R = reagent
 			remove_reagent(R.id, R.volume * part)
 

code/modules/surgery/organs/vocal_cords.dm

@@ -961,7 +961,7 @@
 
 			//health
 			switch(H.health)
-				if(100)
+				if(100 to INFINITY)
 					speaktrigger += "I feel fit, "
 				if(80 to 99)
 					speaktrigger += "I ache a little bit, "