It is very lucky that they are not concentrating on Annabelle. It is however, understandable. No one would be crazy enough to try and climb one of those things, right?

Annabelle rolls near the leg of the strider and stows her guns for the moment. She's going to need both hands for this...

With a cinematic leap Annabelle is on the Striders leg and climbing as quickly as she can to the knee...