K.A.
I am not a adoptive parent, but I may have an idea you can try. It came with mentioning your husband having grown-up versions of tantrums. When my kids have a tantrum whether it is just crying or throwing them selves around or just being completely disagreeable, my husband will dramatically imitate their tantrum. For instance, I have a rule at my house that you have to eat any fruit and vegetables on your plate before you can leave the table. Yesterday morning, my 9 year old who for whatever reason does not like fruit of any kind got up from the table without eating his pineapple chucks. My husband ordered him to sit back down and eat them. My 9 year old sulked up and said that he did not like fruit. My husband told him to eat them or he could sit there all day. My nine year old ate with the most deplorable face you ever saw and my husband responded by exaggerating a disgusted face and gagging and all that goes with having something nasty in your mouth. My son continued with his face, but it was clear that he was having some trouble keeping it up. My husband has been know to throw himself on the floor and kick and scream while exaggerating a tantrum.
When my children fall and it is obvious that they are OK, my husband will exaggeratedly check on the floor or whatever they fell against to insure that it didn't get "hurt" before checking on the child. This usually shocks my kids out of crying or stops the tears if they have already started.