An “alibi” is not just an excuse, it is proof that you can’t have done it / been there. If you’ve got an alibi, you’re innocent (and not just claiming to be).
Breathing CS gas? Keep a vinegar or lemon-soaked handkerchief over your mouth, effective for short periods. (I assume you keep these in some kind of sealable plastic bag). A squirty water bottle (like cyclists use) is good for cleaning CS-gassed eyes.
"[Joseph] Paxton’s proposed solution to the 19th-century traffic problems in central London was the Great Victorian Way or Crystal Boulevard, unveiled to the Select Committee in June 1865. This monumental arcade was to have formed a 16-km (10-mile) ‘girdle’ around London linking all rail termini and would include shops, cafes and hotels as well as a main street and railway systems. Its estimated cost of construction was £34 million and although the Committee recommended his plan to Parliament, it was never realised"
Potatoes are high in vitamin C, though they lose it when cooked. So crisps are packed with vitamin C. Though you’d probably not be able to market them as “healthy” (as some sugary orange drinks do) because of all the salt and fat.