Go to a level that has a slope and then a pipe where shy guys pop out if you don't have six eggs. Now, close to the pipe, but on the slope so that you're above the pipe, stomp, and hold the down button. You will be in your funny looking stomp position. Now, sit there and wait. Shy guys will jump out and walk up to you and die. This only works with some slopes... if you're level with or below the shy guys, you get hurt doing this.
Submitted by: kornyhatemachine