Which denman do you have?
This shall forevermore be known as "THE RUDEE CLUMPER"! At least that's what I'm calling it.
I tried it this morning and I have fabulous clumps BUT I think from now on I will practice this method while still in the shower. I get just about the same results working with soaking wet hair while still in the shower and I don't have to mop up the bathroom after I get through throwing palmfuls of water around. Plus, I'm able to get more water into the back of my hair. I sure have some happy, clumpy hair this morning!
ETA: I am going to experiment with this method using the sink to see if it might give me any success with 2nd day hair.
I tried this today and had to get back in the shower and get my head wet again, lol.
It just made me all tangly. For whatever reason, I just need to do this all upside down.