"Unlike the typical Hollywood CGI depictions of asteroid impacts, where an extraterrestrial charcoal briquette gently smolders across the sky, in the Yucatan it would have been a pleasant day one second and the world was already over by the next. "

at one point the crater is deeper than the Mariana trench and the wall of ejecta is higher than Mount Everest

neat

"For several hours following the Chicxulub impact, the ENTIRE Earth was bathed with intense infrared radiation from ballistically reentering ejecta. The global heat pulse would have killed unsheltered organisms directly and ignited fires at places where adequate fuel was available.... global flux of thermal radiation reaching Earth’s surface ‘‘of the order of 10 kW·m^2 over periods ranging from one to several hours after the impact. These power levels are comparable to those obtained in a domestic oven set at ‘broil'. Thermal energy at the Earth’s surface would have been concentrated within 6000 km of the impact and concentrated again at its antipode (Melosh et al., 1990; Boslough et al., 1996). The amount of overhead thermal radiation everywhere, however, would have been sufficient to ignite terrestrial fuel except where Earth’s surface was shielded by very dense cloud cover. Normal cloud cover would not have provided sufficient protection for exposed organisms; such cloud cover ‘‘is readily evaporated and may not [have provided] much protection to the forests beneath’’

Robertson et al, 2004. Survival in the first hours of the Cenozoic. GSA Bulletin, 116(5/6), pp.760-768.

The dinosaurs got to go out in style. We, on the other hand, can't even engineer a decent extinction event.