This is what the megatsunami would have looked like from the shore. I'm not good at drawing waves and the wave here looks more like a mountain. It gets the point across though. A wall of white Wave height: 100 m (330 ft)

The asteroid linked to the extinction of dinosaurs, which created the Chicxulub crater in the Yucatán Peninsula approximately 66 million years ago, would have caused a megatsunami over 100 meters (330 ft) tall. The height of the tsunami was limited due to relatively shallow sea in the area of the impact; had the asteroid struck in the deep sea the megatsunami would have been 4.6 kilometers (2.9 mi) tall. Among the mechanisms triggering megatsunamis, the direct impact, shockwaves, returning water in the crater with a new push outward and seismic waves with a magnitude up to ~11 A more recent simulation of the global effects of the Chicxulub megatsunami showed an initial wave height of 1.5 kilometers (0.9 mi), with later waves up to 100 meters (330 ft) in height in the Gulf of Mexico, and up to 14 meters (46 ft) in the North Atlantic and South Pacific; the discovery of mega-ripples in Louisiana via seismic imaging data, with average wavelengths of 600 meters (2,000 ft) and average wave heights of 16 meters (52 ft), looks like to confirm it. David Shonting and Cathy Ezrailson propose an "Edgerton effect" mechanism generating the megatsunami, similar to a milk drop falling on water that triggers a crown-shape water column, with a comparable height to the Chicxulub impactor's, that means over 10–12 kilometers (6–7 mi) for the initial seawater forced outward by the explosion and blast waves; then, its collapse triggers megatsunamis changing their height according to the different water depth, raising up to 500 meters (1,600 ft). Furthermore, the initial shockwave via impact triggered seismic waves producing giant landslides and slumping around the region (the largest known event deposits on Earth) with subsequently megatsunamis of various sizes, and seiches of 10 to 100 meters (30 to 300 ft) in Tanis, 3,000 kilometers (1,900 mi) away, part of a vast inland sea at the time and directly triggered via seismic shaking by the impact within a few minutes.