We know birdstrikes and the captain saying "Sorry bird" when they hit one, BUT what if it isn't a bird but a:
Lion Air jet hits cow after landing
http://www.smh.com.au/travel/travel-incidents/lion-air-jet-hits-cow-after-landing-20130808-2rhpn.html
http://www.avherald.com/h?article=4667a3d9&opt=0