Who hasn't done a first solo and not thought about this? Before I did mine I used to fantasise about heroically preserving my aircraft on the way into work!
It took me ages to find the right day and I'd done loads of hours compared to most people before I went. I began by worrying about engine failures or blocked runways, but by the time I soloed I was (much more realistically!) concerned about myself managing to land on the nosewheel somehow, or similar. Didn't of course (and yes, it was one of the best landings I've done so far), but I think that the more flying you do, the more you realise that you yourself are the most dangerous thing and, short of the rarer disasters, most situations can be either avoided or dealt with if you have sufficient presence of mind.