keywords: skater skating tatiana concussion fall
text: Ice skater doesn #39;t remember what caused fall that left her with a &lt;b&gt;...&lt;/b&gt; World champion pairs skater Tatiana Totmianina said Monday she still doesn #39;t know what caused her to fall and sustain a concussion during a weekend skating program, though she says she doesn #39;t fear going back on the ice.