This is just meant to be silly. ^_^ ... You do exactly as the title of the forum says. Suppose L went to another anime (ex: L wakes up in Hetalia), and if this were to happen, what do you think he would do there (ex: if he went to Higurashi, how do you think he'd try to figure out what is going on and how quickly would he be able to?)?
I'll start. Explain a situation you believe to be likely, if L stumbled into the world of Soul Eater. =)