CREATE TABLE table_38931 ("Player" TEXT, "Touchdowns" FLOAT, "Extra points" FLOAT, "Field goals" FLOAT, "Points" FLOAT)

Which Extra points is the highest one that has a Player of herrnstein, and Points smaller than 30?
SELECT MAX("Extra points") FROM table_38931 WHERE "Player" = 'herrnstein' AND "Points" < '30'
SELECT MAX("Extra points") FROM "table_38931" WHERE "Player" = 'herrnstein' AND "Points" < '30'