Pour a shot of DeKuyper raspberry pucker schnapps into a shot glass. Place the shot glass inside the bottom of a pint glass. Pour Bacardi silver rum around the outside of shot glass (but inside the pint glass) and carefully float some on top of the raspberry pucker by pouring over the back of a spoon pressed against the inside of the shot glass. Top it all off with Guinness. If done correctly, all ingredients should stay separated until the drink is downed in one fell swoop.