Fork/front tire alignment problem

Ok, so earlier this week I wake up to find that some tool knocked my bike over during the night. It appears that no serious damage was done, but now BOTH the handlebars and fork are turned slightly to the right. I tried realigning them by getting my roommate to put the tire between his knees while i twist and yank on the handlebars - and it worked (sort of). After everything appears to be in alignment I hit the starter and off I go. Now the bike is pulling hard to the left. I turn around, undo the alignment, and the bike rides straight and true, minus the aligned handlebars and fork. wtf? any suggestions?