`` one day about a year ago there was this dreadful pounding on my door , and i ran into the bathroom and locked myself in and pretended i was n't there , because i thought somebody was trying to break in ... and then later i found out that the woman upstairs had got her hand caught in the drain of her sink -- she has one of those disposall things -- and a knife had gotten down into it and she reached her hand down to get it and got caught .