Toe walking idiopathic toe walkers, a family link has been observed. Idiopathic toe walking can be described as bilateral toe walking with no orthopedic or neurological cause past the age of two. In this condition, children are able to voluntarily walk with the normal heel-toe pattern, but prefer to walk with the toe-toe pattern. In order for it to be considered idiopathic, the child's medical history should be clear of any neurological, orthopedic, or neuro-psychiatric conditions including other gait abnormalities. Two classifications of idiopathic toe walking have been established. The Alvarez's classification identifies the severity of the dysfunction based upon kinematics and
1987 (What the Fuck Is Going On?) out of our mouths... Not a pleasant sound but it's the noise we had. We pressed it up and stuck it out. A celebration of sorts." Jimmy Cauty defended sampling as an artistic practice: "It's not as if we're taking anything away, just borrowing and making things bigger. If you're creative you aren't going to stop working just because there is a law against what you are doing." In 1991, Drummond admitted: "We didn't listen to "1987 What The Fuck's Going On" for a long time, and when we did we were embarrassed by it because it was so badly