(c) inngglstoodt
The bumping sound results from ice lumps hitting the underbody of the train. Snow on the track is swirled by the suction of the train and agglomerates to heavy ice lumps. When those lumps become too heavy, they peel away of the underbody, hit the track ballast, splatter and smash back into the underbody.
(c)inngglstoodt!
Doing 268 kmh / 167 mph on the very first German high-speed line Hannover -- Würzburg on the very first German high-speed passenger train in the section Hannover -- Göttingen
(c) inngglstoodt
Notice the strange behaviour short before stillstand. This has to be a malfunction of the traction converters or the engine speed sensor resulting in an inappropriate pulsing of the traction converters
(c) inngglstoodt!
ICE-trains and the "München-Nürnberg-Ex press" (regional train) on the Ingolstadt-Nürnberg high-speed line. Filmed in Kinding and Denkendorf.
Filmed in Möringen near Stendal on the Hannover-Berlin high-speed line. Maximum speed 250 kmh / 155 mph. Due to construction works on the line several kilometers away, trains hat to slow down and accelerate again like the first ICE in this video.