Cuckoo catfish antics question?

i have a cuckoo catfish in a 40 gallon tank. his/her tank mates are 3 diamond tetras, a pea eel, 3 upside down cats and a baby red tail shark. The cat fish has more than enough room to swim and is ignored by all the fish. how ever instead of swimming around the middle of the tank like my LCF said it would it hides under a leaf for about two seconds, swims vertically up the side of the wall parallel to the waters surface, around the filer bar ( a loop de loop) then back down the other wall and then back under the leaf and does it all over again. Is this dangerous for the fish?