Watching vander scream all the way down to the sudden stop and knowing that your help didnt help, would mess up anyones thinking and fill it full of guilt right? Not magolor, granted it did prick his brain that someone had just died, but the seriousness of the event hadn't sunk in yet, so he found the 'hole' situation rather funny so-to-speak. While gripping the now very light carpet he turned torward everyone letting out a few chuckles and said the first thing that came to mind. 

"Ha ha well.. it guess he DIDN'T have a great fall!" 

Unable to control his laughter after the reactions his joke got from the remaining party. His laughter let loose and sounded like hysterical laughter, but he really did find it hilarious! It distacted him from the sadness that he should be feeling, and he ended up laying on the ground laughing away his fear as well. 

Just when his laugher was toning itself down however, he noticed the oil lamp was still functional and let out a pun (that wasnt as funny as he apparently saw it) that set him right back to uncontrollable laugher. Quite honestly he found everything funny at the momment. 

"At least we still have 'oil' light!" (Our) 

Was he going to take this search/rescue seriously and find out what the hell is up with this mansion? Yes he was, but he'll be damed if he doesnt get a few good laughs along the way.