Sounds pretty toxic to me...and also sounds like he had a cleansing reaction from releasing all that yucky stuff! Christmas indulgences could have also contributed. Emotions can be released during any cleanse. The cold, clammy shakey feeling can happen during a colonic, too...usually when the cecum (first part of the colon) is releasing. It generally passes as soon as the material has been expelled. Given how much he eliminated this may be what happened. If the feeling persisted he should drink lots of water and replace electrolytes that may have been lost too quickly.
He should go back to 2 doses...but only if he feels comfortable to do this. Some people throw off toxins so rapidly that it overwhelms their body and need to proceed more slowly. When he does increase the doses he should probably do it when there aren't so many tasty temptations around so that he can better determine if the reaction is to the cleansing or to something he's eaten.