Context: Death from laughter is a rare form of death, usually resulting from cardiac arrest or asphyxiation, caused by a fit of laughter. Instances of death by laughter have been recorded from the times of ancient Greece to the modern day.
 Question: can you have a heart attack from laughing Context: The fifth season of the American crime thriller television series The Blacklist premiered on NBC on September 27, 2017, with a timeslot change from Thursday at 10:00 PM to Wednesday at 8:00 PM. The season was produced by Davis Entertainment, Universal Television and Sony Pictures Television, and the executive producers are Jon Bokenkamp, John Davis, John Eisendrath, John Fox, and Joe Carnahan. The season is scheduled to consist of 22 episodes that will contain the series' 100th episode.
 Question: is there a 5th season to the blacklist Context: Jumping spiders are a group of spiders that constitute the family Salticidae. This family contains roughly 635 described genera and about 6080 described species, making it the largest family of spiders with about 13% of all species. Jumping spiders have some of the best vision among arthropods and use it in courtship, hunting, and navigation. Although they normally move unobtrusively and fairly slowly, most species are capable of very agile jumps, notably when hunting, but sometimes in response to sudden threats or crossing long gaps. Both their book lungs and tracheal system are well-developed, and they use both systems (bimodal breathing). Jumping spiders are generally recognized by their eye pattern. All jumping spiders have four pairs of eyes, with the anterior median pair being particularly large.
 Question: is there such thing as a jumping spider Context: The velocity with which the reaction process propagates in the mass of the explosive. Most commercial mining explosives have detonation velocities ranging from 1800 m/s to 8000 m/s. Today, velocity of detonation can be measured with accuracy. Together with density it is an important element influencing the yield of the energy transmitted for both atmospheric over-pressure and ground acceleration. By definition, a ``low explosive,'' such as black powder, or smokeless gunpowder has a burn rate of 171--631 m/s. In contrast, a ``high explosive,'' whether a primary, such as detonating cord, or a secondary, such as TNT or C-4 has a significantly higher burn rate.
 Question: tnt is an example of a high explosive
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