Hi, I am new to the L4D2 Speed run community, I'm sure this question has been answered probably but i really really need to know...

This happens to me frequently when i am trying to kill the A.I and it's frustrating.

See this thread: http://www.speedrun.com/l4d2/thread/n1juv And for the problem in your video, the bots have some invincibility during the middle part of the revive animation, so you have to generally be fast.

I just read the post, Thanks alot man. I see, good to know. geez, this is really infuriating.

Honestly, I feel like kicking should be allowed specifically in solo runs considering solo is a made-up category anyway. I get disallowing it for co-op runs to keep consistency. L4D1 leaderboards don't have a solo-specific category so there isn't really any crossover here, and a lot of runs already on YouTube kicked the bots.

To be clear, I like that there is a solo category in L4D2, I think it is important to attract more runners because it isn't easy to get a good team together to run it co-op. It's also great practice, I feel I am a much better runner right now for the solo runs as it trains you to handle commons and specials on your own, leading to getting stuck less when you are with other players.

As for killing the bots, yeah, that invulnerability is quite annoying. There is a period in the beginning and end where you can deal damage, so one thing I try to do sometimes (like in Dark Carnival) is hurt at least the first bot a lot without downing them, then switch to the other bots and finish them all off much closer together before they have time to attempt a pickup. Also, if you do down one right away and manage to switch to the bot initiating pickup next, you can usually get them in time. Otherwise, down the bot that isn't picking up first and/or hurt the bot more that you've downed while you wait for the invulnerability period to end, then down that one last. You'll get a feel for it eventually.