If it's the part about 7:50 in, it looks like he's slapping a hook to try to get it to set better. Someone who speaks Czech might help. My brother does, I'm tempted to ask him to translate the whole thing. It's interesting to watch Ondra take those whips while trying to drill.
By the Way he's hitting it straight in I'd think it was a cam hook. You wouldnt hit a bat hook like that. I guess it could be a knife blade or pin of some kind but the speed with which he places it and then weights it make me think it's a cam hook.
Can't believe he tried to drill while free climbing - that looked a bit dangerous. Hooking seemed way safer. I think it's really cool that he is doing this type of stuff. He must be having the time of his life right now.
I bet his friends are as well. Look at that dude hanging out in the tree.
Suggest you look up such FA's on sight ground up such as "Innominate" 500' and others ..on the Eastern Reef.. San Rafaen Swell in Utah by Lance Bateman "Only" 5.12 but all bolts placed on lead from free stances no hooking.
By M Sprague Administrator From New England Nov 5, 2012
If you want to do a good job, ground up for a sport route seems pretty silly to me unless there is some practical reason for it. It looks like somebody got him a decent drill too, instead of that little thing that sounded like it was ready to incinerate. Both those crags he was working on look super sweet. I wish I could find one like them in my neck of the woods.