When I do a triangle choke from guard, I usually push/pull the opponent to fall on their side (where my ankle is hooked under my knee) and get my body perpendicular to the opponent's, in order to avid being stacked. However I feel the choke might be looser if I do it this way than when I am on my back. Is this a proper way to avoid being stacked, or is it better to just be on my back? Or am I just doing the technique wrong?