I was filling a clients nails today and I was filing off the parts of arylic that had lifted and I got to her thumb and and started on what I thought was a part of acrylic that I thought was lifting and I didnt want to file too much so I grabbed my nippers and snipped off the lift and to my suprise it was her natural nail that I cut off!!!!!!!!!!!! She said it didnt hurt and even afterwards said it still wasnt bothersome.... What could have caused an air bubble in her natural nail???? This really scared me and really is bothering me!!!!