That might work if you're at some small gathering or something where she's forced to be around you again. If you're anywhere else, it's a load. Some mentally deranged girls might go for that, but more likely, she's just going to forget you ever existed or think you crumbled like a cookie like 80% of guys that try to approach her do unless you were super intriguing to her in the first place. The only way those situations usually work is that if you somehow cross paths again and both aren't acting like retards or trying to play some game the second time around. Might as well be normal and act interested the first time - that's going to be your best shot with any girl.