Context means lots, IMO. It frames the potentialities for us. Seeing someone slip on ice is not funny, unless you know the person to be a lout. Seeing Mary Travers slip on ice is not funny, IMO. Seeing Bush do the same would likely give me a chuckle. SINSULL posted something outrageously funny on the other thread; however it was not funny to her at the time.
A friend of mine died in a car crash many years back. I went to dress his body prior to the funeral. Long story made short: He'd been late for everything in his whole life. While locking up the place I checked the gymnasium. In everyone's hurry to get to the church which was 30 miles away, they had forgot my friend's body, complete with casket. I burst out laughing. If there is anything to an afterlife, I would bet he did, too.