On one hand Kylo Ren seems to be really unsure about himself on the other he sees himself as Vader's heir. Being confronted by someone with as much affinity for the Force as himself (or even more so) might shatter his self-esteem, so he got distracted and lost… I mean that's basically the big Sith thing isn't it,…

I actually was quite on edge during the scene on the bridge. While I expected Solo to die (for all the above reasons) at least the german dub seemed to suggest that Kylo Ren might attempt some sort of suicide with the help of his father. Would have been interesting if this attempt backfires and mutilates Kylo Ren.…