I actually had the Cubs game on the TV. That wasn't scary enough, but what I saw happen on the field was really scary. It's the top of the 4th Inning, 1 out, a 1-0 count on Jason Giambi, who pops up the next pitch. The popup is in the infield, in front of the mound. Kerry Wood sort of goes for it, but first baseman Hee Seop Choi comes in to make the grab. The two of them collide, and when Choi comes down, his head bounces hard off the the foul line dirt between 3rd and home. Well, he looked like he was out (as in unconscious). The trainers rushed out there and got in his face to see if they could get a reaction (I couldn't really tell), then they place a hand on his chest, sort of to make sure he was breathing and they took his pulse (carotid and wrist). He looked in really bad shape. They opened-up the big doors in right field and brought in a Fire Department ambulance (fortunately, there's a firehouse a few doors across the street and a few doors down from the left field corner). They eventually got him on a gurney, got him in the ambulance, worked on him a while, and they finally left. It shook up the teams and the fans. You never want to see a player get hurt. Oh, BTW, he held onto the ball for the out.
Update: He's in fair condition with a concussion.

OK, don't tell anyone, but I'd probably get in trouble by reproducing images of the telecast without express written permission of Major League Baseball, Chicago Cubs, and Fox Television...