Speaking about bonnet popping at high speed, i once saw a guy driving on the highway. Can't remember was it a Wira or Waja, suddently while driving the whole bonnet popped out. Due to wind, it went straight up, 90 degrees. The driver freaked out and just slammed on the brakes. So much smoke and few cars behind jam their brakes too. Luckily nothing happened but obviously he was so shocked that he just slam on his brakes without thinking whether a lorry is behind him or not. My guess is that he was doing 90kmh.