I was thinking that if I come across an athletics track available to the public, I'd try the mile as it is simply 4 laps of the 400m track...and try and break the 4/8 minute mile!

And, as for field, I once wondered why shot-putters don't use something like a football throw-in...until I checked the rules.

My best (of very limited) hope at the high-jump probably would be to dive over, as above.