T.r. yell is an All That sketch parodying MTV's TRL with Jack DeSena as Carson Daly, who was always annoyed by the obnoxious, screaming fans behind him, and always yelled at them to be quiet, often never succeeding. The sketch mainly revolved around young pop star sensation, "Lil' Fetus" (played by Bryan Hearne), who is so young that he hasn't even been born yet, and was only visible with the use of a sonograph. The sketch featured Lil' Fetus's pregnant mother, who was also his manager. (Seasons 7-8) Later, after Brian's departure, Lil' Fetus was replaced by Christina Kirkman as younger pop sensation "Lil' Embryo".

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