magic thumb

[Svejk]

Oooer, just found I can move the cursor thing on this
Blackberry phone without actually touching the roller-
ball thing(merely by passing my thumb over it)Is this
a well known explainable phenomenom or have I indeed
become,,,,,,,,,,,,,MAGIC....

[murraymints]

can you bring your magic thumb round and open this jar of olives please ?