Twitchy prowlingSnape?

[ladyramkin2000]

No: HPFGUIDX 86202

Perhaps as a teenager, he experienced one of those sudden spurts in 
height that tend to occur around fifteen, resulting in an awkward, 
shambling walk. Both my sons went through this stage, before coming 
to terms with their own height.  Snape is described as a tall man.
It could be that, at an age of maximum sensitivity, this was his way 
of dealingwith his new, gangling body.
Sylvia